Question

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

Answer 1

9×67-a=5×7 9×7-a=35 9-a=5 A=4 B+10×3=8×8 B+30=64 B=304 91-(c+3×9)=6×8 91-(c+27)=48 C+27=43 C=16 D-7×8=9×4 D-56=36 D=92

Answer 2

63-a=35
a=35+63
a=98

b+30=64
b=64-30  b=34

91-(c+27)=48
91 +48 = 139
c+27=139
c=139-27
c=112

d-56=36
d=36+56
d=92

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