Question

HELP ASAP!! GIVING 20 POINTS AND BRAINLIEST!!! Solve for x. y=7x-7z-9

Answer 1

We just need to see everything that is not x as a number.

if I asked
$5 = 7x - 7(2) - 9$
we would solve it by combining like terms first. but, if I tell you not to do that, we would add 9 and 7(2) to both side and end up with
$5 + 7(2) + 9 = 7x$
we would then divide both sides by 7
$\frac{5 + 7(2) + 9}{7} = x$

math is always math... it's just how we look at it. so, do the same steps!
$y = 7x - 7z - 9$
add 9 and 7z to both side
$y + 7z + 9 = 7x$
divide both sides by 7
$\frac{y + 7z + 9}{7} = x$