Question

I need help on elimination :(

Answer 1

i have to use the elimination process to solve this : y=75x+150 & y=90x+75

Answer 2

put them in standard form Ax + By + C
-75x + y = 150 ---->(-1)
-90x + y = 75
--------------
75x - y = -150 (result of multiplying by -1)
-90x + y = 75
--------------add
- 15x = - 75 -- divide both sides by -15
x = -75/-15
x = 5

now sub 5 in for x in either of the original equations to find y
-75x + y = 150
-75(5) + y = 150
- 375 + y = 150
y = 150 + 375
y = 525

now we can check our answers..
-90x + y = 75
-90(5) + 525 = 75
-450 + 525 = 75
75 = 75 (correct)

so x = 5 and y = 525 or (5,525)

any questions ?

Answer 3

thank you so much

Answer 4

sure thing :)