Question

Help with 7 and 8 pls.

Answer 1

7.) 20 8.) -117 / 11

Explanation:

7.) 4/5 * 20 - 1/4x * 20 = 11 *20

16x - 5x = 220

11x =220

x = 20

8.) - 0.55x - 0.45 = 5.4

-0.55x * 100 * 0.45 * 100 = 5.4 * 100

-55x - 45 = 540

-55x / -55 = 585 / -55

x = 117 / 11