Question

Solve 7x - 2y = -3
14x + y = 14

Answer 1

do you prefer substitution or elimination ?

Answer 2

well....lets just do substitution...it is probably easier.
14x + y = 14 ---> y = -14x + 14
now sub -14x + 14 in for y in the other equation to find x
7x - 2y = -3
7x - 2(-14x + 14) = -3
can you take it from here or do you still need help ?

Answer 3

is it 14x+4=-6

Answer 4

im doing the same type of problem texaschic101 i need help whats the next step

Answer 5

except mine is y=4x+6 and y^2+x^2=40,000

Answer 6

I keep getting the wrong answer with substitution, so I am gonna do elimination

7x - 2y = -3
14x + y = 14 --->(2)
------------
7x - 2y = -3
28x + 2y = 28 (result of multiplying by 2)
-------------add
35x = 25
x = 25/35
x = 5/7

now sub 5/7 in for x in either of the equations to find y
7x - 2y = -3
7(5/7) - 2y = -3
35/7 - 2y = -3
5 - 2y = -3
-2y = -3 - 5
-2y = -8
y = 4

check...
14x + y = 14
14(5/7) + 4 = 14
70/7 + 4 = 14
10 + 4 = 14
14 = 14 (correct)

x = 5/7 and y = 4

Answer 7

texaschic101 i need ur help on my problem