The problem is 45y -7.8 = 15y + 7.2
Please show me the steps to solve the equation. I'm a little rusty.
2007-10-19 08:32:34 · 4 answers · asked by Dancer3d 4 in Science & Mathematics ➔ Mathematics
Here are the steps for this equation:
45y - 7.8 = 15y + 7.2
Subtract 15y from each side:
45y - 7.8 -15y = 15y + 7.2 - 15y
Combine like terms:
30y - 7.8 = 7.2
Add 7.8 to each side:
30y - 7.8 + 7.8 = 7.2 + 7.8
Combine like terms:
30y = 15
Divide each side by 30:
30y/30 = 15/30
Reduce:
y= 1/2
2007-10-19 08:35:43 · answer #1 · answered by Jean-Guy 3 · 1⤊ 0⤋
30y = 15
y = 1/2
2007-10-19 09:41:16 · answer #2 · answered by Como 7 · 1⤊ 0⤋
add (7.8-15y) to both sides of the equation
then divide both sides of the equation by 30
2007-10-19 08:47:07 · answer #3 · answered by Anonymous · 0⤊ 0⤋
45y - 15y = 7.2 + 7.8
30y = 15
y = 15/30
y = 0.5
2007-10-19 08:43:44 · answer #4 · answered by MARS 3 · 0⤊ 0⤋