Question

4.Решите уравнение:

84 : х = 6 х 7

3 х у = 87 - 6

290+х=640-260 400-х=275+25

Answer 1

84:x=42
x=84:42
x=2

3*y=81
y=81:3
y=27
290+x=380
x=380-290
x=90
400-x=300
x=400-300
x=100