2x+y=5
x+y=4
We need to solve 2x+y=5 for y
let's start by adding -2x to both sides
2x+y-2x=5-2x
y=-2x+5
Now substitute -2x+5 for y in x+y=4
x+y=4
x-2x+5=4
-x+5 =4
Add -5 to both sides so we can find the value for x
-x+5-5=4-5
-x=-1
We know that x can not stay with the negative sign so to eliminate that we need to divide both sides by -1
-x/-1= -1/-1
x=1
Now we have the value for x :)
We need to find the value for y by substitute 1 for x in y=-2x+5
y=-2x+5
y= (-2)(1)+5
y= -2+5
y= 3
Final answer : x=1 and y=3
(1,3)
I hope that's help :)
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