Question

Bob wants to sub 3x + y = 13 into 4x +3y = 6 he needs to do what to get this

Answer 1

x = 6.6, y = -6.8

Explanation:

Subtract 3 x from both sides of the equation.

y = 13 - 3x

4x + 3y = 6

Replace all occurrences of y with 13 − 3 x in each equation.

-5x + 39 = 6

y = 13 - 3x

Solve for x in the first equation.

x =
`(33)/(5)` or 6.6

Replace all occurrences of x with 6.6 in each equation.

y =
`-(34)/(5)` or - 6.8

hope this helps, good luck :)