Answer:
Step-by-step explanation:
-8x + 2y = -4 12x - 3y = 4
y = -3x - 2 y = 4x
sub sub
-8x + 2(-3x - 2) = -4 12x - 3(4x) = 4
-8x - 6x - 4 = -4 12x - 12x = 4
-14x = -4 + 4 0 = 4
-14x = 0 NO SOLUTION
x = 0 ========================
y = -3x - 2 -3 + 2y = 5
y = -3(0) - 2 -4x + y = 10...y = 4x + 10
y = -2 sub
solution is : (0,-2) -3 + 2(4x + 10) = 5
================ -3 + 8x + 20 = 5
3x + 2y = 11 8x + 17 = 5
x + 2y = 9...x = 9 - 2y 8x = 5 - 17
sub 8x = - 12
3(9 - 2y) + 2y = 11 x = -12/8
27 - 6y + 2y = 11 x = -3/2
-4y = 11 - 27
-4y = -16 y = 4x + 10
y = -16/-4 y = 4(-3/2) + 10
y = 4 y = -12/2 + 10
y = -6 + 10
x = 9 - 2y y = 4
x - 9 - 2(4) solution (-3/2,4)
x = 9 - 8
x = 1
solution : (1,4)
x will equal 30...set them equal to each other and solve from there
C) x = -1
Steps:
1/4 (x - 7) = 2x (distribute 1/4 with x and -7)
1/4x - 7/4 = 2x (distributed)
1/4x - 7/4 - 2x = 0 (put all values on 1 side)
1/4 x - 2x = 7/4 (put the x values together and 7/4 on the other side. *make sure you switch the signs (+ & -) when moving the values to the other side of the equal sign)
1/4x - 8/4x = 7/4 (multiply 2x by 4 on on top and bottom. *2x written as fraction is 2x/1)
-7/4 x = 7/4 (when you subtract 1/4x with 8/4x you get -7/4)
(-7/4)x / (-7/4) = 7/4 / (-7/4) (divide both sides by -7/4 to solve for x)
X = -1
Reminders when multiplying or dividing:
2 positives make a positive
2 negatives make a positive
A positive and a negative make a negative
A negative and a positive make a negative
Answer:
b
Step-by-step explanation:
3/8ths i think but im not sure so dont completly rely on me
