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avanturin [10]
3 years ago
8

What is the solution to y=5x-7 -3x-2y=-12

Mathematics
2 answers:
poizon [28]3 years ago
7 0
Since <span>−3x</span><span> does not contain the </span>variable<span> to solve for, move it to the right-hand side of the </span>equation<span> by adding </span><span>3x</span><span> to both sides.
</span><span>y=5x−7</span> 
<span>−2y=3x−12

</span>Divide<span> each </span>term<span> in the </span>equation<span> by </span><span><span>−2</span>.
</span><span>y=5x−7</span> 
<span>y=−<span><span>3x/</span>2</span>+6

</span>Create a graph<span> to locate the </span>intersection<span> of the </span>equations<span>. The </span>intersection<span> of the </span><span>system of equations</span><span> is the </span>solution<span>.
</span>
<span>(2,3)
</span>

likoan [24]3 years ago
4 0
y=5x-7 \\&#10;-3x-2y=-12 \\ \\&#10;\hbox{substitute 5x-7 for y in the 2nd equation:} \\&#10;-3x-2(5x-7)=-12 \\&#10;-3x-10x+14=-12 \\&#10;-13x+14=-12 \ \ \ |-14 \\&#10;-13x=-26 \ \ \ |\div (-13) \\&#10;x=2 \\ \\&#10;y=5x-7=5 \times 2-7=10-7=3 \\ \\&#10;\boxed{(x,y)=(2,3)}
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