Explicație pas cu pas:
y:9+25-3=8-3+25
y:9=8-3+25+3-25
y:9= 8
y= 8x9
y=72
8×m+26=3×30
8×m= 90-26
8×m=64
m= 64:8
m= 8
ax9-23=70:7×4
a×9-23=10×4
ax9-23=40
ax9= 40+23
ax9=63
a=63:9
a= 7
