Question

3. Solve, using the substitution method.

5x + 2y = 7
y = x – 7

Answer 1

Just plug in y=x-7 into 5x+2y=7

Answer 2

so 5x+2(x-7)=7
now solve for x...

Answer 3

You would distribute the 2 inside the paranthesis and add like terms and find x
then you would plug in x and solve for y...

Answer 4

@helpdummy

Answer 5

ok so then how would i solve for y when all there is is x's
@TheSmartOne

Answer 6

You would find y by plugging back what you get from x.

Answer 7

@TheSmartOne i am thinking its no solution

Answer 8

5x+2x-14=7
7x-14=7
7x=21
x=3

Answer 9

Now plug back in x into any equation
y=3-7
y=-4

Answer 10

So your solution is x=3 and y=-4

Answer 11

you didnt have to answer because i feel bad i didnt do the work myself

Answer 12

@TheSmartOne

Answer 13

its okay..