Answer:
y = -12/(4d - 7d)
Step-by-step explanation:
Step 1: Write equation
4dy + 12 = 7dy
Step 2: Solve for y
Subtract 7dy on both sides: 4dy + 12 - 7dy = 0
Subtract 12 on both sides: 4dy - 7dy = -12
Factor out y: y(4d - 7d) = -12
Divide both sides by 4d - 7d: y = -12/(4d - 7d)
Hello! :)
First thing you do is add -7dy to both sides
4dy + 12 + -7dy = 7dy + -7dy
-3dy + 12 = 0
Next you will have to add -12 to both sides
-3dy + 12 + -12 = 0 + -12
-3dy = -12
Last thing you have to do is divide both sides by -3d
-3dy/-3d = -12/-3d
y = 4/d (ANSWER)
