Answer:
y=x+2; y=5
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
63/7 is 9
Answer:
x = 3.5 + 0.5y
Step-by-step explanation:
Simplifying
2x + -1y = 7
Solving
2x + -1y = 7
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add 'y' to each side of the equation.
2x + -1y + y = 7 + y
Combine like terms: -1y + y = 0
2x + 0 = 7 + y
2x = 7 + y
Divide each side by '2'.
x = 3.5 + 0.5y
Simplifying
x = 3.5 + 0.5y
So, the first brand has 9% vinegar, and say we use "x" amount of it, then, the amount of vinegar in "x" is 9% of x, or (9/100) * x, 0.09x.
the second brand has 14% of vinegar, and if we use say "y" amount of it, then the amount of vinegar in "y" is really just 14% of "y" or, (14/100) * y, 0.14y.
so, whatever "x" and "y" are, we know that
x + y = 230.
and we also know that their concentration amounts will also add up,
0.09x + 0.14y = 29.9.
how many milliliters will it be for the second brand? well, y = 230 - x.