Question #901a6

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Answer 1 · 2017-12-17T12:02:37

#x=-3#

It is given that;

#x+5=2#

Subtract #5# from both sides;

#x+5-color (green)5=2-color (green)5#

#x=-3#

Hope it helps!

Answer 2 · 2017-12-17T12:13:19

Graphical approach

The other answers are the most efficiant means of solving this question, but i just wanted to provide a graphical interpritation:

enter image source here

Red #=> y = x +5 #
Blue #=> y= 2 #

Where these two lines intersect, that is the solution to the problem:

Hence we see they cross at #(-3,2)#

#=> x= -3 #

Im not sure if you learnt about grpahs of lines, but when you do, this is an interesting way of thinking about it!