Solve by substitution x-2y = - 25 and 3x-y=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)