exam Maths Puzzle Numerical Ability

I need help to solve this problem seems I can get the right answer
Solve
3(x - 2) + 7x = 8x + 0

Read Solution (Total 0)

exam Other Question
4ax+ by=11ab 8ax-5by= ab x=? y=? Solve the system by addition or substitution.
-4x + 2y = -12
y = 2x - 7