how do you solve 7x+9x=128?

On the left-hand side, combine like terms -- 7x + 9x is just 16x, so:

16x = 128

Then divide both sides by 16 and you get:

x=8

It potential for you to unravel for the variable cutting-edge in the subject... so thus your going to ought to unravel and locate the cost of x... So... 7X -5 = 6X +6 +5 +5 7X = 6X + eleven -6X -6X X= eleven

7x + 9x = 128
16x = 128
x = 8.

16x=128
16x divide 16=128 divide16
x=8

like terms
16x=128
divide by 16
u get
x=8

thats ur asnwer, x=8, :)

hope this helps :D

16 x = 128
x = 8

7x + 9x = 16x
so
16x = 128 (divide by 16)

x = 8

16x = 128

=> x = 128 / 16

=> x = 8

8