Question

solve using elimination-

7. 3x+3y=27
x-3y=-11

9.2x+4y=22
2x-2y=-8

11.5x-4=0
3x+y=24

Answer 1

for question 7, if you add the 2 equations you eliminate y and have an equation in x to solve

3x + 3y = 27
+ x - 3y = -11
---------------
4x = 16

now solve for x.

when you get the answer substitute the value into either equation to find y.

hope it helps

Answer 2

so x=4? @campbell_st

Answer 3

thats's correct.... now use either equation and x = 4 to find y

Answer 4

A bicycle store costs $2400 per month to operate. The store pays an average of $60 per bike. The average selling price of each bike is $120. How many bikes must the store sell each month to break even?

Answer 5

@campbell_st