Question

Consider the following equation 70 = bx + 7

What value of b will result in the solution x = -9?
A: 11
B: -11
C -7
D 7

Answer 1

-7

Explanation:

70=bx+7

70=b(-9)+7

70=-9b+7

-7. -7

63=-9b

÷-9 ÷-9

-7=b

Answer 2

I think the answer us C.

Explanation:

70-7=63. 9×7=63 so we now know the two values. if the outcome is a positive number then both answers must be negative (negative times negative=positive).