7m+2n=21
-7m -7m
<u>2n</u>=<u>21-7m</u>
2 2
n=<u>21-7m
</u> 2
<u>
</u>10m+4(21-7m/2)= -10
<u />-10m -10m
4(21-7m/2)= -10-10m
(84-28m/2)= -10-10m
x2 x2
84-28m = -20-20m
+20+28m +20+28m
<u>104</u> = <u>8m
</u>8 8
m=13
10(13) + 4n = -10
-130 -130
<u>4n</u> = <u>-140
</u>4 4
<u>
</u>n= -35
If anything is unclear please feel free to ask.
Answer:
In the number 528.8 the value of 8 in the ones place is 10 times the value of 0.8 in the tenths place
Step-by-step explanation:
we have
The number 528.8 miles
Rewrite the number in digits value

so
The value of the ones digit is 8 ones or 8
The value of the tenths digit is 0.8 tenths or 0.8
Find the quotient
8/0.8=10
therefore
In the number 528.8 the value of 8 in the ones place is 10 times the value of 0.8 in the tenths place
Greatest common factor is 2. Divide both terms by 2 and you get:
4(2z +1)