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sindy35111
08.10.2019 •
Mathematics
4a/5-9=1
a) =
b) the solution is all real numbers
c) there is no solution
Solved
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Ответ:
A) a = -12.5
Step-by-step explanation:
The variable, a, has been multiplied by -4/5 and then -9 added to the product. To solve for a, we undo these operations in reverse order.
To undo addition of -9, we add 9 to both sides of the equation.
-4a/5 = 10
To undo multiplication by -4/5, we multiply the equation by its reciprocal:
(-5/4)(-4a/5) = 10(-5/4)
a = -50/4 = -12.5
The one solution is a=-12.5.
Ответ:
90
Step-by-step explanation:
For each separate year Ramon grew 45 inches. They want to know how many inches he grew in two years. So you could find this two ways, either multiply 45 x 2 or add 45+45 and get the same answer, 90.