Question

760-x=312 x÷10=30
x×10=450 670÷x=670

Answer 1

760-x =312
x=769 - 312
x= 448

x : 19=30
x= 19 · 30
x = 570

x · 10 = 450
x = 450 : 10
x = 45

670 : x = 670
x = 670: 670
x = 1