How do you solve the simultaneous equations #3x+7y=26# and #4x+5y=13#?
2 Answers
I found:
Explanation:
I would multiply the first equation by
So:
Substitute back this value into the first equation:
Explanation:
One way is to use the method of elimination.
Step 1. Enter the equations.
Equation (1)
Equation (2)
Step 2. Prepare the equations.
Multiply every term in each equation by a number so that equal terms can be eliminated.
Multiply Equation (1) by
Equation (3)
Equation (4)
Step 3. Subtract Equation (4) from Equation (3).
(3)
(4)
(5)
#y = 65/13#
Equation (6)
Step 4. Substitute Equation (6) in Equation (2).
Solution:
Check: Substitute the values of