How do you solve #7a+10=2a#?

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Answer 1 · 2016-09-20T20:36:48

leave the a alone

#7a + 10 = 2a#

#10 = 2a - 7a#

#10 = -5a#

#10/-5 = a#

#a=-2#

Answer 2 · 2016-09-20T20:42:43

#a = -2#

You need all the variables on one side and any numbers on the other side.

#7a +10 color(tomato)(-10) color(blue)(-2a) = 2acolor(blue)(-2a)color(tomato)(-10) " "larr# subtract 10 and 2a

#color(white)(xxxxx.x)7a color(blue)(-2a) = color(tomato)(-10) #

#color(white)(xxxxxxxx.x)5a = -10#

#color(white)(xxxxxxxxx.x)a = -2#