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

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SUMMARY

The equation 10 - 2x = 90 - x can be solved by isolating the variable x. The correct steps lead to the conclusion that x = -80. The initial miscalculation arose from incorrectly combining terms, specifically failing to properly isolate x during the simplification process. The correct manipulation of the equation shows that 10 - 2x = 90 - x simplifies to -x = 80, resulting in x = -80.

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Gringo123
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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?
 
Physics news on Phys.org
10-2x=90-x
10-x=90
-x=80
x=-80
 

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