How do you simplify # 3 x + 1 x + 2 − − 5 x + 7 #?

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Answer 1 · 2018-05-04T13:32:13

#=9x+9#

We can add everything together. The variables for themselves and the integers for themselves.

#3x+1x+2-(-5x)+7#

#4x+2-(-5x)+7#

For #-(-5x)# you know that #(-)*(-)=+#. So, since it's written as #-(-5x)# it will be equal to #5x#.

#4x+2+7-(-5x)#

#4x+9+5x#

We will then land on the answer,

#=9x+9#