Question

(1)(160-x）X10=850-5x

Answer 1

(1)(160-x）X10=850-5x

1600-10x=850-5x

10x-5x=1600-850

5x=750

x=750÷5

x=150

(2)x-40=5/4x+40

5/4x-x=-40-40

1/4x=-80

x=80×4

x=320