[15+m1]=-2m+3

add 2m to each side.

Subtract 15 from each side.

thanks

To solve the equation [15+m1] = -2m + 3, we need to isolate the variable m.

Step 1: Distribute the positive sign to the terms inside the square brackets:
15 + m1 = -2m + 3

Step 2: Combine like terms on both sides of the equation:
m1 = -2m + 3 - 15

Step 3: Simplify the right side of the equation:
m1 = -2m - 12

Step 4: To isolate m, we want to get all the terms with m on one side of the equation. We can do this by adding 2m to both sides:
m1 + 2m = -12

Step 5: Combine like terms on the left side:
m1 + 2m = m + 2m = 3m

The equation becomes:
3m = -12

Step 6: In order to solve for m, divide both sides of the equation by 3:
(3m)/3 = -12/3
m = -4

So, the solution to the equation [15+m1] = -2m + 3 is m = -4.