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Gianna Camacho
Mathematics
29 May, 02:26
Solve the linear equation using substitution.
2x+9y=-4
X-2y=11
+1
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2
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Allyson
29 May, 02:48
0
X=7
y=-2
...
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Tessa Bolton
29 May, 02:55
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X=15 y=-2
Step By Step:
Step 1: solve for x in the second equation (x-2y=11) x=11+2y
Step 2: Substitute this value of x into the first equation (2x+9y=-4) giving you 2 (11+2y) + 9y=-4
Step 3: distribute the 2 throughout the parentheses giving you 22+4y+9y=-4
Step 4: simplify each side giving you 22+13y=-4
Step 5: solve for y (subtract 22 from both sides then divide by 13) giving you y=-2
Step 6: substitute this value of y into either equation (I used x-2y=11) giving you x-2 (-2) = 11
Step 7: solve for x (multiply - 2 by 2 and add this value to both sides) giving you x=15
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