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Mathematics
Morgan Gibbs
28 June, 11:44
Solve by substitution x-2y = - 25 and 3x-y=0
+2
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)
Morgan Blackburn
28 June, 12:13
0
x=5 and y=15
Step-by-step explanation:
x-2y=-25
x-2y+2y=-25+2y (Add 2y to both sides)
x=2y-25
Step: Substitute2y-25forxin3x-y=0:
3x-y=0
3 (2y-25) - y=0
5y-75=0 (Simplify both sides of the equation)
5y-75+75=0+75 (Add 75 to both sides)
5y=75
5y
5
=
75
5
(Divide both sides by 5)
y=15
Step: Substitute 15fory in x=2y-25:
x=2y-25
x = (2) (15) - 25
x=5 (Simplify both sides of the equation)
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