Solving 10 -2x = 90 - x: Find x Value

Thread starter Gringo123
Start date Dec 10, 2009

AI Thread Summary

To solve the equation 10 - 2x = 90 - x, the correct steps involve isolating x. Starting with 10 - 2x = 90 - x, rearranging gives 10 - 90 = 2x - x, leading to -80 = -x. This simplifies to x = -80, confirming the correct value of x. The initial miscalculation stemmed from incorrectly combining terms. The final solution is x = -80.

Dec 10, 2009

Gringo123

I can't work this one out. I need to find the vlaue of x

10 -2x = 90 - x

I come up with 3x = 80 which I know is wrong. This is how I get there:

10 -2x = 90 - x
10 -3x = 90
3x = 80

The actual answer is x= -80. Where am I going wrong?

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Dec 10, 2009

itr

10-2x=90-x
10-x=90
-x=80
x=-80

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