Question

как решить уравнение (45-y)+18=58, 56-(x+12)=24, 55-(x-15)=30

Answer 1

1) y=5
2) x=20
3) x=40

Answer 2

(45-y)+18=56
45-y+18=56
y=56-45-18
y=-7


56-(x+12)=24
56-x-12=24
x=24-56+12
x=-20


55-(x-15)=30
55-x-15=30
x=30-55+15
x=-10