Quandaries
and Queries |
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How do we solve 2x - 5x + 6.3 = -14.4 Please help on this, math is beyond me and I am trying to help my freshman son. Thank you, Leslie |
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Hi Leslie, It sometimes helps to think of an equation as a balance with the balance point at the equal sign. You have a balance with 2x - 5x + 6.3 on the left side and -14.4 on the right. The challenge is to manipulate the equation, maintaining the balance, and end with the variable x alone on the left side and a number on the right, that is
There are four manipulations you can perform that will maintain the balance. - You can add the same amount to both sides
- You can subtract the same amount to both sides
- You can multiply both sides by the same amount
- You can divide both sides by the same amount, as long as that amount is not zero.
In your equation the first step is to rewrite 2x - 5x as -3x.
I want to have x alone on the left side so subtract 6.3 to each side to get
Finally, to end with x alone on the left, divide both sides by -3 to get
Penny |