heavendl13
17.03.2020 •
Mathematics
(x^2 - 1)(x^2 + 4) = 0
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Ответ:
X is -1
Step-by-step explanation:
Ответ:
28 less means subtract 28
7 times a number means7x
is means equals
20 more than a number means x +20
the equation is 7x-28 =x+20
to solve combine like terms
7x-x=20+28
6x=48 divide by 6 on both sides to isolate x
x=8