-7x2y=-13
x-2y=11
Slove useing subtract
1 answer:
-7x+2y=-13
x-2y=11
add them euations
-7x+2y=-13
<u>1x-2y=11 +</u>
-6x+0y=-2
-6x=-2
divide both sides by -6
x=1/3
sub back
x-2y=11
1/3-2y=11
minus 1/3 both sides
-2y=10 and 2/3
divide both sides by -2 (or times both sides by -1/2)
y=-5 and 1/3
x=1/3
y=-5 and 1/3
(1/3,-16/3)
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The answer to your question is every Wednesdays they will make a profit hope this helped have a nice day :)
Answer: 17 years
Step-by-step explanation:
Let mary's age be m
2m-7 = m+10
Subtracting m from both sides:
m-7 = 10
Therefore, m = 17
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