Equations from the heart....

3(3x + 2) = x + 7

.9x + 6 = x + 7 // times 3 with the #'s inside the bracket.
.9x = x + 7 - 6 // Minus then move the 6 over
.9x = x + 1 // Minus then move the x over
.8x = 1 // Divide 8x by 8
.8x divided by 8 = x // x must equal ...
.x = 1 over 8 // Final answer :)

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