Question

Determina valorile lui a din egalitatile:238-173-7×7=2×a. (5×10+10×5+9:3)-63=5×a

Answer 1

65-49=2×a
16=2×a
a=16:2
a=8

(50+50+3)-63=5×a
(100+3)-63=5×a
103-63=5×a
40=5×a
a=40:5
a=8