Question

If 3x+5=-4 evaluate 2x-5

Answer 1

solve for x in the first equation:

3x+5 = -4

subtract 5 from each side

3x = -9

divide both sides by 3

x = -9 / 3 = -3

x=-3

now solve 2nd equation:

2x-5=

2(-3)-5 = -6 -5 = -11