Question

Solve the system of equations: what is the x-value for the solution?
2x + 7y = 3 and x = 1 - 4y


-1

5

4

3

Answer 1

x=5 &y=-1

Answer 2

use your second equation to make a substitution for the first equation

eq 1 : 2x + 7y = 3

eq 2 : x= 1-4y

replace x value in equation 1.

2(1 - 4y) + 7y = 3

distribute.

2(1) - 2(4y) + 7y = 3

2 - 8y + 7y = 3

2 - y = 3

-y = 1

y = -1

now that we've found y, we can plug y back into any of our equations to solve for x. You will then have both of your values.

Answer 3

thxxxx :) :D