Meeeowwmikaviz
Answered

Lesson: Systems of Linear Equations solved by algebraic method
1. Find two variables whose difference is 15 and whose sum is 53.
How do you do this by substitution and elimination method?
Please help me. 

Sagot :

Cheahjimmyviz
x+y = 53
x-y =  15                / by elimination
2y = 38
y =19
x+19=53
x=  34

x+y =53
x= 53-y
53-y -y =15    /by substituition
-2y = -38
y =19
x+19 = 53
x = 34