Answer:
Step-by-step explanation:
The four steps of linear combination method are
1) Rearrange like terms such that they are in the same column.
2) The next step is to decide on which variable you want to eliminate and multiply each row with suitable numbers that would make the coefficient of the variable to be equal and opposite.
3) Add both rows and solve for the other unknown variable.
4) substitute the known variable into any of the equations and solve for the other variable.
4x + 2y = 5
−4x − 5y = 7
We would eliminate x by adding both equations. It becomes
- 3y = 12
y = 12/- 3 = - 4
Substituting y = - 4 into the first equation, it becomes
4x + 2 × - 4 = 5
4x - 8 = 5
4x = 5 + 8 = 13
x = 13/4 = 3.25
Combine fractions by finding common denominator
Ans: 8x+7y/7x-8y
Answer:
Except -1(12w-6)
Step-by-step explanation:
It's equivalent to -12w+6 when expand
Answer:
D
Step-by-step explanation:
I might be wrong, so somebody check my answer please. The open circle means that number is not included in the graph. So less than 8 would be D.
Answer: The man looked for a long time until finding the flag
Step-by-step explanation:I did the quick