How do you solve #0.2( x + 20) - 0.04( x - 50) = 2.8#?

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Answer 1 · 2016-09-23T13:02:34

#x=-20#

#0.2(x+20)-0.04(x+50)=2.8#

Let's first get rid of the decimal coefficients.

Multiply through by 100 #->#

#20(x+20)-4(x-50)=280#

Then #div# through by #4 ->#

#5(x+20)-(x-50)=70#

#5x+100-x+50=70#

#4x=-80#

#x=-20#