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9×7-a=5×7
b+10×3=8×8
91-(c+3×9)=6×8
d-7×8=9×4

Răspuns :

Magda006
9×7-a=5×7
63-a=35
a=63-35
a=28

b+10×3=8×8
b+30=64
b=64-30
b=34

91-(c+3×9)=6×8
c+27=91-48
c=43-27
c=16

d-7×8=9×4
d-56=36
d=36+56
d=92

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