Question

Решить уравнение 20+x = (100-x) *4

Answer 1

20+х = 400 - 4х

х+4х = 400 - 20

5х =380

х= 380:5

х=76

Answer 2

20+х=(100-х)•4

20+х=400-4х

4х+х=400-20

5х=380

х=380:5

х=76