Kenneth S. answered • 07/24/17
Tutor
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
do what the instructions say. you know that y can be expressed in terms of x, so SUBSTITUTE 2x+9 in place of y in the first equation.
3x + 4(2x+9) = -8. Distribute, collect like terms, solve for x. Then back-substitute to compute y. EASY. Just like the examples in your textbook or notes!
