In a proportional relationship, x and y will increase at the same rate. In order to find the value of x when y=4, we first have to find the ratio of x:y. We can do this by creating a fraction. After we know the ratio, simply replace the y value with 4 and solve for x. Here's the math:
y=15 when x=3 given values
y/x = 15/3 = 5 ratio of y to x
y=5x equation representing the proportional relationship
4=5x replace y with 4
4/5=x divide both sides by 5 to isolate x
Answer: The value of x=4/5 when y=4.
Hope this helps!
Hello.
You would write the equation like this:
Let me know if that was what you were looking for.
Answer:
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Step-by-step explanation:
Equation A : x + z = 6
Equation B : 2x + 3z = 1
Possible step used in eliminating in z-term.
Multiply equation A by -3.
-3(x +z) = -3(6)
-3x - 3z = -18
-3x - 3z = -18
<u>2x + 3z = 1</u>
-x = -17
<u>÷ -1 ÷ -1
</u>x = 17