Make sure that when you bring a number to the other side of the equal sign, you need to change from + to - or from - to +
Answer:
Step-by-step explanation:
Put the values of x and y in the equations and solve the resulting system.
A(2) +(-3) = 5
A(2) +B(-3) = 20
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The first equation tells the value of A:
2A = 8 . . . . add 3
A = 4 . . . . . .divide by 2
This and the second equation tells the value of B:
(4)(2) -3B = 20
-3B = 12 . . . . . subtract 8
B = -4 . . . . . . . divide by -3
The values of A and B are 4 and -4, respectively.
Answer: 1) 500, 000
2) Five hundred thousand
3) 
Step-by-step explanation:
To express: 5 of 100, 000 in three expressions (First - number. second - word , third - scientific )
5 of 100, 000 = 5 x 100, 000 = <u>500, 000</u>
In word -<u> Five hundred thousand</u> [ as place value of 5 = hundred thousand]
In scientific notation, 
Hence, the required expressions:
1) 500, 000
2) Five hundred thousand
3) 
3/10 as a percent is c, 30%