[ sqrt(8)/sqrt(2) ] + [ 10/5 Hertz-seconds ] + cos(180°) + ϵ-0 - log(10) + [ sqrt(6) ]2
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(60 - 2*27) + 9/3 = 9
It is an algebraic expression involving x. Of do you mean 'what is x if 2x - 9 equals 9?' 2x - 9 = 9 ⇒ 2x - 9 + 9 = 9 + 9 ⇒ 2x = 18 ⇒ 2x ÷ 2 = 18 ÷ 2 ⇒ x = 9
6
1+1226
"9 less than 7" means you are subtracting 9 from 7. In mathematical terms, this expression can be written as 7 - 9, which equals -2. So, 9 less than 7 is -2.