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autumnhuls5720
19.02.2021 •
Mathematics
-2(n-12)+1=-2n+25
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Ответ:
infinite solutions
Step-by-step explanation:
use the distributive property
-2n + 24 + 1 = -2n + 25
-2n + 25 = -2n + 25
+2n +2n
25 = 25
infinite solutions
Ответ:
Step-by-step explanation:
let's convert the statement into equation..
let the charge of 1st mechanic be x and second be y..
by the question..
10x+5y=750...(i)
x+y=105..(ii)
from eqn(ii)..
x+y=105
or, x=105-y...(iii)
substituting the value of x in eqn (i)..
10x+5y=750
or, 10(105-y)+5y=750
or, 1050-10y+5y=750
or, 1050-750=5y
or, y=300/5
•°• y=60
substituting the value of y in eqn(iii).
x=105-y
or, x=105-60
•°• x= 45..
the rate charged by two mechanics per hour was 60$ and 45$