X+2y=4 -x-2y=-4the solutions
1 answer:
subtract equations to form the equation of:
2x + 2y = 8
rearrange first equation to make x the subject:
x = 4 - 2y
subsitute into 2x + 2y = 8
2 (4 - 2y) + 2y = 8
8 - 4y + 2y = 8
collect like terns
-2y + 8 = 8
8s cancel out
-2y = 0
divide by -2
<u>y</u><u> </u><u>=</u><u> </u><u>0</u>
substitute y value into x + 2y = 4
x + 2 (0) = 4
solve for x
x + 0 = 4
<u>x</u><u> </u><u>=</u><u> </u><u>4</u>
therefore, the solutions are:
<h3>
<u>x</u><u> </u><u>=</u><u> </u><u>-</u><u>4</u></h3><h3>
<u>y</u><u> </u><u>=</u><u> </u><u>0</u></h3>
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If you want me to explain I can!
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Hope this helps!
