Question

15 is equal to 3-4x(x is equal to -2) fid wether given equation is equal or not

Answer 1

Here is your answer

$15 = 3 - 4x \\ 15 - 3 = - 4x \\ - 4x = 12 \\ x = - 12 \div 4 \\ x = - 3 \\ \\ next \: equation \: is \\ x = - 2$
so both equations are not equal

Hope it helps you