Question

What value of b will make the expressions −12.8x+b and −3.2(4x−2.1)+2.4 equivalent?

Answer 1

• b = 9.12

Explanation:

Simplify the second expression and compare with the first one:

• - 3.2(4x - 2.1) + 2.4 =
• - 12.8x + 3.2*2.1 + 2.4 =
• - 12.8x + 6.72 + 2.4 =
• - 12.8x + 9.12

Comparing with the first expression the value of b is:

• b = 9.12