Find the value of y when x equals -20
x+3y=7
2 answers:
X=-20
Plug in -20 into the equation to get y.
-20+3y=7
3y=27
y=9
<span>x+3y=7
Substitute -20 for x
-20+3y=7
Add 20 to both sides
3y=27
Divide 3 on both sides
Final Answer: y=9</span>
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