Question

3×(56-a)+(a-56):1+17×3+27:3=60

Answer 1

3×(56-a)+(a-56)+51+9=60
3×(56-a)+(a-56)=0
168-3a+a-56=0
168-2a=56
2a=112
a=56

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daca nu intelegi ceva intreaba-ma

Answer 2

3×(56-a)+(a-56):1+17×3+27:3=60
3×(56-a)+(a-56):1+51+9=60
3×(56-a)+(a-56):1=60-51-9
3×(56-a)+(a-56):1=0
168-3a+a-56=0×1
168-2a-56=0
168-56=2a
112=2a
a=112:2
a=56