Homework Help: Math (Grade 9)

Posted by Maddison on Monday, June 13, 2011 at 9:02pm.

Solving Linear Equations:

x
_ - 3 = 5

7

I know you have to add three to each side, but after that im not sure what to do,, please help!

Math (Grade 9) - Ms. Sue, Monday, June 13, 2011 at 9:09pm
x/7 = 8

Multiply both sides by 7.

x = 56
Math (Grade 9) - Maddison, Monday, June 13, 2011 at 9:11pm
I dont understand how x/7 is 8 because how do you know what x is ???
Math (Grade 9) - Ms. Sue, Monday, June 13, 2011 at 9:25pm
(x/7) - 3 = 5

Add 3 to both sides.

x/7 = 8

Multiply both sides by 7.

(x/7) * 7 = 8 * 7
x = 56

Proof:

(56/7) - 3 = 5
8 - 3 = 5

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