540 ÷ х + 15 = 150 : 2х × 50 + 100 × 9 = 250 × 4120 + х × 15 = 375600 - 120 + х × 12 =...

Question

540 ÷ х + 15 = 150 : 2




х × 50 + 100 × 9 = 250 × 4




120 + х × 15 = 375





600 - 120 + х × 12 = 600




1 260 + 12 × х = 3 000

Answer 1

540/x+15=75
540/x=75-15
540/x=60
x=540/60
x=9

50x=2-100-9
50x=-107
x=-2.14


120+x=375-15
120+x=360
x=240

-120+x=12
x=-108