Question

Tolong dijawab dengan cara nya yah.. no.10 dan 11

Answer 1

10. 2x + 4x = 90
6x = 90
x = 90/6 = 15
11. 5x + 3x + 12 = 180
8x + 1 2 = 180
8x = 180 - 12
8x = 168
x = 168/8 = 21
3x + 12 = 3(21) + 12 = 63 + 12 = 75