Question

10) 6x + 7y = 20
y=2x

Answer 1

x=1, y = 2

Explanation:

It tells you that y=2x, so wherever there is a "y" in the

problem simplify that and replace it with 2x. Then solve the

equation for x. Once you find the value of x, you can

then multiply that value by 2 to find the value of y.

6x + 7(2x) = 20 multiply the 7 through the parenthesis

6x + 14x = 20 add the like terms together

20x = 20 divide both sides by 20

20x/20 = 20/20

x = 1

Answer 2

Explanation:

if y = 2x then write 2x in the first equation instead of y

6x + 7 × 2x = 20

20x = 20

x = 1