Mathematics
OpenStudy (anonymous):

Solve 7x – 2 = 12x Answer x ≈ 3.28 x ≈ 0.31 x ≈ –7.22 x ≈ –0.14

Isolate the x's on one side and everything without x on the other

OpenStudy (anonymous):

7^x-2=12^x

Subtract 7x from both sides.$7x-2=12x$ $-2=5x$ Divide by 5 $x={-2\over 5}$ and @josettestuff is correct, -2/5 is -0.4 as a decimal

That makes things more fun.

Ok so the question is $\huge 7^x-2=12^x$?