How to do three questions on page 1 13 of the first volume of the seventh grade mathematics textbook? - Training Enrollment Network

How to do three questions on page 1 13 of the first volume of the seventh grade mathematics textbook?

People's education society? Yes: When x is what value, are the two algebraic expressions equal?

Solution: x-(x- 1)/3=7-(x+3)/5.

Remove the denominator:15x-5 (x-1) =105-3 (x+3).

Without brackets:15x-5x+5 =105-3x-9.

Transfer and merger: 13x=9 1.

Coefficient 1: x=7.

A: When x=7, the values of two algebras are equal.

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