Question 120340
{{{-1.2x+20=-2.8x+28}}} Start with the given equation



{{{10(-1.2x+20)=10(-2.8x+28)}}} Multiply both sides by 10 to move the decimal on each number 1 time. This will make every number a whole number.


{{{-12x+200=-28x+280}}} Distribute and multiply



{{{-12x=-28x+280-200}}}Subtract 200 from both sides



{{{-12x+28x=280-200}}} Add 28x to both sides



{{{16x=280-200}}} Combine like terms on the left side



{{{16x=80}}} Combine like terms on the right side



{{{x=(80)/(16)}}} Divide both sides by 16 to isolate x




{{{x=5}}} Divide


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Answer:

So our answer is {{{x=5}}}