What is expand (A+B=1,)-(-2A+B=-1) ?

The solution to expand (A+B=1,)-(-2A+B=-1) is (A+B=1,)+2A-B=1

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expand (A+B=1,)-(-2A+B=-1)

expand

(A + B = 1,) - (- 2 A + B = - 1)

(A + B = 1,) + 2 A - B = 1

Solution steps

(A + B = 1,) - (- 2 A + B = - 1)

= (A + 1 =, B) - (- 2 A + = B - 1)

- (- 2 A + B = - 1) : 2 A - B = 1

(A + B = 1,) + 2 A - B = 1

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What is expand (A+B=1,)-(-2A+B=-1) ?
The solution to expand (A+B=1,)-(-2A+B=-1) is (A+B=1,)+2A-B=1