X+y=7
x-y=-3
Use elimination to solve each system of equations.
Show your work!!!

Given

x + y = 7……………..(1)

Let us consider x = 1

Then equation (1) becomes

1 + y = 7

y = 6

Let us consider x = 2

Then equation (1) becomes

2 + y = 7

y = 5

∴ (1,6) and (2,5) are the two solutions of x + y = 7.

The formula is (x-y)³=x³-3x²y+3xy²-y³. You convert it to (x-y)³=x³-3xy(x-y)-y³ for an illustration. ... You take the drawing of the formula (x+y)³=x³+3x²y+3xy²+y³ from above and replace a by the difference x-y.

i'm assuming it's looking for the missing length, which should be 4cm

hope this !