Question

Solve the system of equations: what is the x-value for the solution?

2x + 7y = 3 and x = 1 - 4y

Answer 1

are you familiar with the substitution method?

Answer 2

yeah a little but its hard to understand

Answer 3

okay well since x = (1-4y)
plug (1-4y) into the other equation where the x is.
in order to solve for a variable the entire equation has to be in terms of one variable..
so:
2(1-4y)+7y=3
2-8y+7y=3
2-y=3
y=-1

so now knowing y=-1.. assuming i haven't made any mistakes, you can put that into either equation and then solve for x..

hope this helps?! let me know

Answer 4

wait let me check this.

Answer 5

if you want to check your answer, you should find that x = 5, y = -1