Ok so if you notice every choice is solved for a, all you have to do is isolate "a" in 7a-8b=10x. Start by moving 8b to the other side and to change the sign. Now it is 7a = 10x + 8b. Then divide everything by 7 and you get a = (10x + 8b)/7
Answer:
Step-by-step explanation:
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Answer:
Option B) (-1,7,5) is correct.
The solution to the given system of equation is (-1,7,5)
Step-by-step explanation:
Given system of equations are



To find the solution of the given system of equations by using Elimination method:
Now adding equations (1) and (2)


_________________

________________


(since "-" getting cancelled)
Now adding equations (1) and (3)


_________________

________________



Now adding equations (4) and (5)


_________________

________________

Therefore y=7
Substituting y=7 in equation (4)




Therefore x=-1
Now substituting the values x=-1 and y=7 in equation (1) we get




Therefore z=5
Therefore the solution to the given system of equation is (-1,7,5)
Therefore Option B) (-1,7,5) is correct.
Answer:
Word Form: Six million, seven thousand, two hundred
Expanded Form: 6000000 + 7000 + 200
Step-by-step explanation:
This number is already in what is called Standard Form.
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4/7 x 21/40
This problem can be reduced.
1/1 x 3/10
In reducing this we cross multiply 4 into 4 is equal to 1, 4 into 40 is equal to 10 and 7 into 7 is equal to 1, 7 into 21 is equal to 3.
Answer = 3/10