Question 1031138
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Using both the addition principle and multiplication principle, solve: 
x + 1/4 x=10
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I don't know these principles.

I simply do this:

{{{x + (1/4)x}}} = {{{10}}},

{{{(4/4)x + (1/4)x}}} = {{{10}}},

{{{(5/4)*x}}} = {{{10}}},

x = {{{(4/5)*10}}},

x = 8.
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