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Solve the system by substitution. y=−3x-2 -7x+3y=10 PLEASE HELP
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Solve the system by substitution. y=−3x-2 -7x+3y=10 PLEASE HELP
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Mar 21, 2017
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Solve the system by substitution.
y=−3x-2
-7x+3y=10
PLEASE HELP
Mathematics
middle-school
Roychri
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Roychri
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y=-3x-2
subsitute -3x-2 for y
-7x+3(-3x-2)=10
distribute
a(b+c)=ab+ac
3(-3x-2)=-9x-6
-7x-9x-6=10
add like terms
-16x-6=10
add 6
-16x=16
multiply -1
16x=-16
divide 16
x=-1
subsitute
y=-3x-2
y=-3(-1)-2
y=3-2
y=1
x=-1
y=1
(x,y)
(-1,1)
Nickle
answered
Mar 25, 2017
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Nickle
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