Question

3. Solve these systems of equations by the substitution method.

a.
* = 3y - 7
4x + 3y = 2

Answer 1

Y=2

X=-1

Explanation:

In substitution method we have to put the value of one variable from first equation to the another given equation.

here equation are

x=3y-7 ......a

4x+3y=2 .......b

put the value of x from equation first into the second equation

so, 4(3y-7)+3y=2

(12y-28)+3y=2

15y-28=2

15y=2+28

15y=30

or y=30/2=2

now put this y value in equation a

x=3(2)-7

x=6-7=-1

hence y=2 and x= -1