montamonta0204
23.06.2019 •
Mathematics
Santana wants to give one-tenth of all his marbles, plus eight more to his brother. which expression can santana use to calculate how many of his total marbles (m) he wants to give to his brother? a) 8 - 10 m b) 8 + 10 m c) 8 + m 10 d) 8 - m 10
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Ответ:
As the sides shown are same so the base of large triangle is double the base of smaller triangle
so,
2(2x-8)=20
distributing 2 over bracket,
4x-16=20
adding 16 to the other side
4x=20+16
4x=36
dividing by 4 on the right side
x=9