9x + 9 - 1 = 9x + 8
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9x + 91 is already simplified because there is nothing that is on the other side of the "equals" sign.
x+5+3x-7+9x+3-4x Collect like terms: 9x+1
You can just add them together. The answer is 9x.
12x + 6=9x + 27 12x-9x + 6=9x - 9x + 27 subtract 9x from both sides. 3x + 6 = 27 simplify 3x + 6 - 6=27 - 6 subtract 6 from both sides. 3x=21 simplify 3x/3=21/3 divide both sides by 3 x=7 simplify 12(7) + 6=>84+6=>90 9(7) + 27=>63+27=>90 It checks out!
That will depend on the plus or minus value of 4y in order to simplify the given expression