17 x (5+a) = 17 x b + 17 x 13
A = ?
B = ?
1 answer:
Answer:
a=-85/4
b=53/4
Step-by-step explanation:
17x(5+a)=17xb+221. (1)
85+17xa=17xb+221
85+(17xa)-(17xb)-221=0
17xa-17xb=-136
17x(a-b)=-136
a-b=-8
a=-8+b. (2)
Replace a=-8+b to (1):
17x5x(-8+b)=17xb+221
85x(-8+b)=17xb+221
-680+85xb=17xb+221
-680+85xb-17xb-221=0
-68xb-901=0
-68xb=901
b=-53/4
Replace b=-53/4 to (2):
a= -8+(-53/4)= -85/4
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Step-by-step explanation:
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Now we solving it :
#10:
15·12=180
180÷3=60
60·22=1,320
