Помогите решить уравнения b+4=5×2 , 6×6-y=6 , 9×9+x=100 , (80-d)×5=60

Question

Помогите решить уравнения b+4=5×2 , 6×6-y=6 , 9×9+x=100 , (80-d)×5=60

Answer 1

B+4=10
b=10-4
b=6

6x6-y=6
36-y=6
y=36-6
y=30

Comments

9×9+x=100

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81+x=100

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x=100-81

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x=19

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(80-d)×5=60

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(80-d)=60:5

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(80-d)=12

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d=80-12

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d=68