Solve the system: 4x - y = 5 x + 2y = 8
2 answers:
Answer:
<h2>x = 2</h2><h2>y = 3</h2>
Step-by-step explanation:
4x - y = 5..........… Equation 1
x + 2y = 8 ............. Equation 2
Make x the subject in equation 2 and substitute it into equation 1
That's
x = 8 - 2y
We have
4( 8 - 2y ) - y = 5
32 - 8y - y = 5
- 9y = - 27
Divide both sides by - 9
We have the final answer as
<h3>y = 3</h3>
Substitute y = 3 into x = 8 - 2y
That's
x = 8 - 2(3)
= 8 - 6
<h3>x = 2</h3>
Hope this helps you
Step-by-step explanation:
4x-y=5-----×1.
x+2y=8----×4.
which will be....
4x-y=5
- 4x+8y=32.
____________
-9y=-27
----- ----
-9. -9.
y=3.
then substitute into any equation...
equation one.
4x-3=5.
4x=5+3.
4x=8.
x=8/4.
x=2.
therefore y=3 and x=2.
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