Answer:
3x−4y=9 −3x+2y=9
Add these equations to eliminate x: −2y=18
Then solve−2y=18
for y: −2y=18 −2y −2 = 18 −2 (Divide both sides by -2)
y=−9
Now that we've found y let's plug it back in to solve for x.
Write down an original equation: 3x−4y=9
Substitute−9for y in 3x−4y=9: 3x−(4)(−9)=9
3x+36=9(Simplify both sides of the equation)
3x+36+−36=9+−36(Add -36 to both sides)
3x=−27 3x 3 = −27 3 (Divide both sides by 3) x=−9
Answer: x=−9 and y=−9
Hope This Helps!!!
Step-by-step explanation:
DC is equal to 180°, so subtract 105 from 180.
180-105=75
180 is the total of the the angles when added together.
67°+75°=142
180-142=38
x=38
Answer:
A
Step-by-step explanation:
because it makes more sense
Find a common denominator which is 100 and add and the answer is 69/100!
