Question

8x4+?=50 9x?+37=10 66-8x?=3

Answer 1

8x4=a=50
32+a=50
a=50-32
a=18

9xa+37=10
9xa=10-37
9xa= -27
a= -27:9
a= -3

66-8xa=3
8xa=66-3
8xa=63
a=63:8
a=7,875

Answer 2

8x4+18=50

9xa+37=10
9a=10-37
9a=-27
a=-3

66-8xa=3
8a=63
a=7,875