how do you solve this equation?

Question

4(m + 5) = 2m - 30

please explain how you did it.

Answer 1

First distribute the left side
4m + 20 = 2m -30
Subtract 20 from both sides
4m = 2m - 50
Subtract 2m from both sides
2m = -50
Divide each side by 2
m = -25

Answer 2

Solve the "m" variable in the equation.

4(m + 5) = 2m - 30
4(m)+4(5) = 2m -30
4m+20 = 2m -30

First: combine "like" terms - subtract 2m from both sides (when you move a term to the opposite side, always use the opposite sign).

4m-2m+20 = 2m -2m -30
4m-2m+20 = -30
2m+20 = -30

Sec: subtract 20 from both sides.

2m+20 -20= -30-20
2m= -30-20
2m = - 50

Third: solve for "m" - divide both sides by 2.

2m/2 = - 50/2
m = -50/2
m = -25

Answer 3

First, use the distributive rule on the left. Then combine like terms, and get m by itself.
4m + 4*5 = 2m - 30
4m + 20 = 2m - 30
(4m - 2m) + 20 = -30
2m + 20 = -30
2m = -30 - 20
2m = -50
m = -50/2 = -25.

Answer 4

you're trying to solve for "m"

so first distribute the 4 to (m+5)

it would be as follows

4m+20=2m-30

then you would take the 2m to the left side of the equal sign and subtract

4m-2m+20=-30

then you would move the 20 to the right side and also add 4m and -2m and get...

2m=-50

then you divide -50 by 2 and get

m=-25

Answer 5

4(m+5)=2m-30 distribute 4
4m+20=2m-30 subtract 2m from each side
2m+20=-30 subtract 20 from each side
2m=-50 divide both sides by 2
m=-25

Answer 6

4(m + 5) = 2m - 30
4m+20=2m-30
2m =-50
m=-25 answer

Answer 7

4(m-5)=2m-30
4m-20=2m-30
2m-20=-30
.....2m=50
......m=25

here's a tip: always keep your = signs aligned. its more neater and easier to read. =]

Answer 8

4(m+5)=2m-30
4m+20=2m-30
4m-2m=-30-20
2m=-50
m=-50/2
m=-25

Answer 9

4m+20=2m-30
4m-2m+20=2m-2m-30
2m+20-20=-30-20
2m=-50
2m/2=-50/2
m=-25

Answer 10

4m-2m = - 50 =

2m = -50..................m = - 25