When a negative number is multiplied by another negative number, the answer will be a positive number. When negative 2x is multiplied by negative 4, the answer should be positive 8x and not negative 8x.

In line 2, it should be +8x , not -8x. Hence therefore, line 3 should be 17x - 23 = -10 . Line 4 should be 17x = 23 - 10 . Line 5 should be x = 13/17 .

Line 1: N/A Line 2: 20-8x should be 20+8x. When a negative sign and another negative sign is multiplied together, the product is a positive one. Line 3:N/A Line 4:N/A Line 5:N/A

On Line 2, the '-' in 20 - 8x should be a '+'. So, it should be like this: Line 2: 9x -3 - 20 + 8x = -10 Line 3: 17x -23 = -10 Line 4: 17x = -10 + -23 Line 5: x = -10 + -23/ 17

Should be 20+8x not 20-8x

ReplyDeleteThis comment has been removed by the author.

ReplyDeleteHe forgot that -4*-2x should be +8x, not -8x.

ReplyDeleteThis comment has been removed by the author.

ReplyDeleteThis comment has been removed by the author.

ReplyDeleteOn Line 2, the third sign should be + and not -

ReplyDeleteIt is supposed to be 9x-3-20+8x=-10

Deletehe should change the negative signs to positive sign at -8x

ReplyDelete9x-3-20-8x=-10

There is a mistake at Line 2. -4*-2x = 8x not -8x!

ReplyDeleteThe second line. It should be +8x as -4 x -2x is +8x

ReplyDeleteWhen a negative number is multiplied by another negative number, the answer will be a positive number. When negative 2x is multiplied by negative 4, the answer should be positive 8x and not negative 8x.

ReplyDeleteThe sign on line 2 should be + and not -

ReplyDeleteIn line two:it should be 20+8x as negative and negative equals positive.

ReplyDeleteThe -8x on line 2 should be +8x as negative times negative is positive.

ReplyDeleteOn the second line of this equation,it should be a positive sign instead of a negative one.As -4 times -2x,20-8x should be 20+8x.

ReplyDeleteThe -8x should be +8x.

ReplyDeletethe error is expanding from line 1 to 2, the error is -4(5-2x)=-20-8x. the correct way is -4(5-2x)=-20+8x

ReplyDeleteIn line 2, it should be +8x , not -8x. Hence therefore, line 3 should be 17x - 23 = -10 . Line 4 should be 17x = 23 - 10 . Line 5 should be x = 13/17 .

ReplyDeleteLine 1: N/A

ReplyDeleteLine 2: 20-8x should be 20+8x. When a negative sign and another negative sign is multiplied together, the product is a positive one.

Line 3:N/A

Line 4:N/A

Line 5:N/A

The second line, He got muddled up. -4 x -2x is 8x as a negative times a negative is a positive.

ReplyDeleteso 17x -23= -10

17x=-10+23

17x=33

so x= 1 6/7

The second line should be 20+8x not 20-8x

ReplyDeleteThe working should be as follows:

ReplyDelete3(3x-1) - 4(5-2x) = -10

After Factorisation, the answer will be:

9x-3-20+8x = -10

Now we move all the common terams together.

9x+8x-3-20 = -10

9x+8x = -10+3+20

17x = 13

x = 17/13

= 1/4/13

1 4/13

DeleteOn Line 2, the '-' in 20 - 8x should be a '+'.

ReplyDeleteSo, it should be like this:

Line 2: 9x -3 - 20 + 8x = -10

Line 3: 17x -23 = -10

Line 4: 17x = -10 + -23

Line 5: x = -10 + -23/ 17

Line 4: 17x = -33

DeleteLine 5: x = -33/17