Question

2.6+3又5分之1÷（9.25×x-x×7又4分之1）=2.85

Answer 1

2.6+3又5分之1÷（9.25×x-x×7又4分之1）=2.85

2.6+3.2÷（9.25×x-x×7.25）=2.85

3.2÷（9.25x-7.25x）=2.85-2.6

3.2÷2x=0.25

2x=3.2÷0.25

2x=12.8

x=6.4