ely093
23.09.2020 •
Mathematics
the sum of two numbers is 83. The sum of 2 times the first number and 3 times the second number is 203. Write a system to find the two numbers
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Ответ:
Step-by-step explanation:
a+b=83
a=83-b1
2a+3b=203
2a=203-3b
a=203-3b/22
1-2=0
so
83-b-(203-3b)/2=0
83-b+(-203+3b)/2=0
83-b-101.5+1.5b=0
83-101.5-b+1.5b=0
-18.5+1/2b=0
b=-18.5*2= -37
so
we know tht -37+A =83
SO A=83+37=120
I THINK I DID IT CORRECTLY,ANYWAY CHECK IT YOURSELF IF IT IS CORRECT PLZ MARK ME AS BRAINLIEST
Ответ:
36:50=0.72 $ lowest price
80:100=0.8
0.85-0.72=0.13 - difference