First Equation ~ 3x-y=0 Second Equation ~ 5y=15
Divide by five on both sides on the second equation to get y=3
Substitute y=3 into the first equation to get 3x-(3)=0
Add the three to both sides to cancel the three on the left to get 3x=3
Divide both sides by 3 to get x=1
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x = 0 and y = 4
(-5, 2)
5y + x = 0 subtract 5y from each side, then x = -5y
18y+5y+48+15 = 270 18y+5y = 270-48-15 23y = 207 y = 9
If y equals 3, 7 - 5y would be:7 - 5(3)Simplify.7 - 15 = -8.In conclusion, 7 - 5y = -8.