You have to find the greatest common factor of each and divide both:
8/64=1/8 (I.e, divide both the numerator and denominator by 8)
4:20=1:5
28/36=7/9
28 to 4=7 to 1
16:48=1:3
Answer:
Step-by-step explanation:
y = x - 5 ← x - 5 can be subbed for y in the second equation, as shown:
3x - y = 7 → 3x - (x - 5) = 7, or 2x + 5 = 7, or 2x = 2, or x = 1.
Subbing 1 for x in the first equation, we get y = 1 - 5 = -4,
and so the solution is (1, -4).
Second system:
2x + 2y = 12
3x + y = 2
Let's eliminate y first. Mult. the 2nd equation by -2, obtaining:
2x + 2y = 12
-6x - 2y = -4
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-4x = 8, and so x = -2. Subbing -2 for x in the 2nd equation, we get:
3(-2) + y = 2, or -6 + y = 2, or y = 8
Then the solution to the second system of equations is (-2, 8).
Step-by-step explanation:
wheres the decimal to compare it to
To determine whether a solution a set of a system of linear inequalities is right, you simply plug back into the equation to check your work. If the solution equals and is mathematically correct, then that's the answer. For Example, use the equation,
5x = 10
Let's say you got an answer of x = 4. Plug it back into the equation
5(4) ≠ 10. As you can see the answer is wrong. This shows you that the answer is wrong.
The correct answer is x = 2