Răspuns:
Explicație pas cu pas:
a)
8 × 4 + a = 6 × 9 + 16 : 2
32 + a = 54 + 8
32 + a = 62
a = 62 - 32
a = 30
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b)
a - 9 × 8 = 32 : 4 + 225
a - 72 = 8 + 225
a - 72 = 233
a = 233 + 72
a = 305
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c)
( 6 × 6 : 4 × b ) - 25 : 5 = 11 × 2
( 36 : 4 × b ) - 5 = 22
9 × b = 22 + 5
9 × b = 27
b = 27 : 9
b = 3
