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Mathematics 8 Online
OpenStudy (anonymous):

A student is trying to solve the set of two equations given below: Equation A: x + z = 6 Equation B: 7x + 8z = 1 Which of these is a possible step used in eliminating the z-term? Multiply equation B by 8. Multiply equation A by 7. Multiply equation B by 7. Multiply equation A by –8.

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