10 was added to some number.This sum was then multiplied by 2, and 15 was taken from the product. If the previous operation resulted in -13, find the initial number.
10 was added to some number.This sum was then multiplied by 2, and 15 was taken from the product. If the previous operation resulted in -13, find the initial number.
Let the number = N
2[10 + N] - 15 = -13, solve for N
20 + 2N -15 = -13
2N = -13 - 20 + 15
2N = -18
N = -18/2
N = - 9
