Answer:
28/5=x and y= -6/5
Explanation:
solve by substitution
3x+4y=12
Rewrite equations:
2x+y=10;3x+4y=12
Step1: Solve 2x+y=10 for y:
2x+y=10
2x+y+−2x=10+−2x(Add -2x to both sides)
y=−2x+10
Step2: Substitute−2x+10 for y in 3x+4y=12:
3x+4y=12
3x+4(−2x+10)=12
−5x+40=12(Simplify both sides of the equation)
−5x+40+−40=12+−40(Add -40 to both sides)
−5x=−28
-5x/-5=-28/5
(Divide both sides by -5)
x= 28/5
Step3: Substitute
28/5 for x in "y=−2x+10":
y=−2x+10
y=−2(28/5)+10
y=-6/5(Simplify both sides of the equation)
Hope this helps!