bugbug26
21.08.2019 •
Mathematics
If 5x+6=10, what is the value of 10x+3?
a) 4
b) 9
c) 11
d) 20
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Ответ:
11 (Option C)
Step by step explanation:
If 5x+6=10
value of 10x+3 = ?
Step 1 : solve the first equation to find the value of x
5x + 6 = 10
5x = 10 – 6
5x = 4
X = 4/5
Step 2 : Susbitute the value of x in the second equation
10x + 3 = ?
10 ( 4/5) + 3
= 40 / 5 + 3
= 40 + 15 /5 (Taking L.C.M)
= 55 / 5
= 11
Ответ:
b) p = ( r - 5 ) * 1.05
c) p = (15.5-5)*1.05 = 10.5 * 1.05 = $ 11.02