5. 2x+y=8 ly=X-7 plz help plzzz
2 answers:
Answer:
x=5,y=-2 or (5,-2)
Step-by-step explanation:
Here is the system of equations:
2x+y=8
y=x-7
Since we have y isolated by itself in the second equation, let's use substitution.
Substitute x-7 as y into the first equation
2x+x-7=8
combine like terms
3x-7=8
add 7 to both sides
3x=15
divide by 3
x=5
now substitute 5 as x into one of the equations to find the value of y
for example let's use y=x-7
y=5-7
y=-2
so x=5, y=-2
as a point it's (5,-2)
Hope this helps! :)
Answer:
x=5 y=-2 (5,-2)
Step-by-step explanation:
2x+x-7+8
3x-7=8
3x=15
x=5
for y
y=-2x+8
y=-2(5)+8
y=-10=8
y=-2
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