Решите пж 9000:100-(18-3*х)=87

Question

Решите пж 9000:100-(18-3*х)=87

Answer 1

9000:100-(18-3х)=87
90-(18-3х)=87
18х=90-87
18-3х=3
3х=18-3
3х=15
х=15:3
х=5
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9000:100-(18-3×5)=87
87=87

Answer 2

9000:100=90-(18-3*1)=87