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dexar [7]
3 years ago
7

5x+y=23 2x+y=11 in elimination method

Mathematics
1 answer:
BaLLatris [955]3 years ago
3 0
Multiply the 2nd equation by -1 then add equations together
-1<span>(2x+y=11<span>)
</span></span>-2x - y = -11
(Adding will eliminate the Y)
3x = 12
------------------------------------
Divide each side by 3
3x ÷ 2 = 12 ÷ 3
x = 4
==================================================================
To find Y substitute 4 for x in 5x+y=<span>23
</span><span><span>(5)(4)</span>+y</span>=<span>23
</span>y+20=<span>23
</span>-----------------------------
Add -20 on each side
<span>y+20+-20</span>=<span>23+-20
</span>y = 3

Your answers are x = 4 and y = 3

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