SOLUTION: Use the method of substitution to solve the system of linear equations.
7a = 3 - b
7a = 5 - b
How many solutions are there?
Algebra ->
Linear-equations
-> SOLUTION: Use the method of substitution to solve the system of linear equations.
7a = 3 - b
7a = 5 - b
How many solutions are there?
Log On
Question 666496: Use the method of substitution to solve the system of linear equations.
7a = 3 - b
7a = 5 - b
How many solutions are there? Found 2 solutions by lynnlo, Alan3354:Answer by lynnlo(4176) (Show Source):
You can put this solution on YOUR website! EXAMPLE FOR YOU TO STUDY SO YOU CAN UNDERSTAND
SUBSTITUTION METHOD
-Y=2X+4
3X+Y=9
SUBSTITUTE Y IN SECOND EQUATION
3X+Y=9
3X+(2X+4)=9
5X+4=9
5X=5
X=1
YOU CAN USE THE VALUE OF X TO FIND Y BY SUBSTITUTING
IN THE FIRST EQUATION
Y=2X+4
Y=2*1+4
Y=6
========SOLUTION IS (1,6)
(