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3 years ago

5

Answer and shown work for 5x + y = 10 -x - y = -2

2 answers:

Paul [167]3 years ago

6 0

<span>5x+y = 10
-x-y = -2
---------------------------------------------------------------------------------------------------------
4x = 8
x = 2
</span>---------------------------------------------------------------------------------------------------------
-x-y = -2
-2-y = -2
-y = 0
y = 0
---------------------------------------------------------------------------------------------------------
Check:
5x+y = 10
5(2)+0 = 10
10+0 = 10
10 = 10
---------------------------------------------------------------------------------------------------------
Solution : x=2, y=0

konstantin123 [22]3 years ago

4 0

Solve first equation for y:
5x+y=10
y=10-5x. Plug this equation into second equation

-x-(10-5x)=-2
-x-10+5x=-2
4x=8
x=2 (plug x into first equation)

5(2)+y=10
y=0

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