Question

17. Donald tried to solve the equation 4x - 11 = -2(6 -- 5x) + 7, but he

made a mistake. His work is shown below.
Step Equation
0 4x 11 -2(6 - 5x) + 7
1 43 - 11 = -12 + 10x + 7
2
43 - 11 = 10.3 - 5
3
143 - 11 = -5
4
143 = 7
5
1
2.
In which step did Donald first make a mistake?

Answer 1

step 2

Explanation:

instead of subtracting 7 to the oposite side they set it aside to then later on add it towards the end.