Question

SOLVING EQUATIONS WITH VARIABLES ON EACH SIDE

-7(2b-4)=5(-2b+6)

I keep getting; -35 = 35, so does that mean the problem has no solution. I just wanna double check so I'm not wrong on my homework!

Answer 1

-7(2b-4)=5(-2b+6)
-14b +28 = -10b + 30
4b = 2
b= 1/2

Answer 2

Oh oops,
-14b + 28 = -10b + 30
-4b = 2
b= -1/2

Answer 3

How is that because the first equals 21 and the second equals 25.

Answer 4

What do you mean the first one equals 21?..

Answer 5

I just typed it into my calculator.
-7(2(1,2)-4 = 21

Answer 6

-7(2b-4) =5(-2b+6)
Distributive property of multiplication.
-14b+28=-10b + 30
-14b = -10b + 2
-4b = 2
b = - 1/2

Answer 7

-1/2 = -0.5

Answer 8

-7(2-(0.5)-4) = 5 (-2-(0.5) +6)
-7(-1-4) = 5(1+6)
-7(-5) = 5(7)
35 = 35

Answer 9

All you need to know for your answer is that B = -1/2 , okay? inputting the value of b just makes sure b works in this problem got it?