Answer:
X=2
Step-by-step explanation:
20x+40=80
20x+40-(80)=0
20x-40=0 20x=40
x=40/20
X=2
Wdym????????????????????????
Answer:
x is 12
Step-by-step explanation:
7.5÷5=1.5
1.5×8=12
X+y=72
x-y=48
Solve for one of the variables.
x=48+y
Then plug into the other equation and solve.
(48+y)+y=72
48+2y=72
2y=24
y=12
Use that answer in one of the formulas to find the other variable.
x+12=72
x=60
You can plug the answers into the original formulas to check the answers.
