Step-by-step explanation:
Hey there!
Here,
While working with them remember some rules;
- (-) + (-) = sign (-) but add them.
- (+) + (+) = sign (+) and add.
- (+) - (+) = subtract but keep sign of greator number.
- (-) -(-) = subtract and keep the sign of greator number.
Likewise in your question,
<em><u>Hope it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>
Let his total money be x.
He spent (3/7)*x of his money.
He gave 1/4(x-3/7x) to his sister.
which is : (1/4)*(4/7)*x = (1/7)*x
Now,
How much money he have in the beginning =
(3/7)*x+(1/7)*x+120=x
(4/7)*x+120=x
120=x-(4/7)*x
120=(3/7)*x
x=120*7/3 [cross multiplication]
x=280.
So, Alex had $280 in the beginning.
Answer:
$300
Step-by-step explanation:
(5000)(2)(3/100)
=300
Answer:
an equation of the first degree in any number of variables.
Step-by-step explanation:
