EXPLANATION
Given the system of equations:
(1) 60x + 110y = 265
(2) 120x + 90y = 270
We can apply the substraction method as shown as follows:
Multiply 60x + 110y = 265 by 2:
----> (60x + 110y = 265)*2 -------> 120x + 220y = 530
Subtract the equations:
120x + 220y = 530
- (120x + 90y = 270)
--------------------------------
130y = 260
Divide both sides by 130:
y= 260/130
Simplifying:
y= 2
Replacing on the first equation:
60x + 110(2) = 265
Applying the distributive property:
60x + 220 = 265
Subtracting 220 to both sides:
60x = 265 - 220
Subtracting like terms:
60x = 45
Dividing both sides by 60:
x = 45/60
Simplifying:
x= 3/4
The solutions to the system of equations are:
x=3/4 y=2