Should be 20+8x not 20-8x
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He forgot that -4*-2x should be +8x, not -8x.
On Line 2, the third sign should be + and not -
It is supposed to be 9x-3-20+8x=-10
he should change the negative signs to positive sign at -8x9x-3-20-8x=-10
There is a mistake at Line 2. -4*-2x = 8x not -8x!
The second line. It should be +8x as -4 x -2x is +8x
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.
The sign on line 2 should be + and not -
In line two:it should be 20+8x as negative and negative equals positive.
The -8x on line 2 should be +8x as negative times negative is positive.
On 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.
The -8x should be +8x.
the 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
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/ALine 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/ALine 4:N/ALine 5:N/A
The second line, He got muddled up. -4 x -2x is 8x as a negative times a negative is a positive. so 17x -23= -1017x=-10+2317x=33so x= 1 6/7
The second line should be 20+8x not 20-8x
The working should be as follows:3(3x-1) - 4(5-2x) = -10After Factorisation, the answer will be:9x-3-20+8x = -10Now we move all the common terams together.9x+8x-3-20 = -109x+8x = -10+3+2017x = 13x = 17/13 = 1/4/13
On Line 2, the '-' in 20 - 8x should be a '+'.So, it should be like this: Line 2: 9x -3 - 20 + 8x = -10Line 3: 17x -23 = -10Line 4: 17x = -10 + -23Line 5: x = -10 + -23/ 17
Line 4: 17x = -33Line 5: x = -33/17