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3 years ago

Solve the system of equations by substituting 15x+31y=−3 x=−y+3

Mathematics

2 answers:

alekssr [168]3 years ago

6 0

Answer:

x=6 y=-3

Step-by-step explanation:

Angelina_Jolie [31]3 years ago

4 0

Answer:

$x=6$

$y=-3$

Step-by-step explanation:

Substitute (-y + 3) for x in the first equation:

$15(-y+3)+31y=-3$

Expand:

$45-15y+31y=-3$

Simplify:

$45+16y=-3$

Subtact 45 from both sides:

$16y=-48$

Divide both sides by 16:

$y=-3$

Substitute -3 for y in either equation:

$x=-(-3)+3$

$x=6$

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