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Izzyfizzy
16.12.2020 •
Mathematics
3/5x + 1/3 =42 solve for x
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Ответ:
9514 1404 393
x = 69 4/9
Step-by-step explanation:
There are a couple of approaches you can take to this. The usual one would be to "clear fractions" by multiplying by 15.
15(3/5x) +15(1/3) = 15(42)
9x +5 = 630
Now, we can subtract 5 and divide by 9.
9x = 625 . . . . subtract 5 from both sides
x = 625/9 = 69 4/9
__
Another way to solve this is to multiply by 5/3 to make the coefficient of x be 1.
(5/3)(3/5x) +(5/3)(1/3) = (5/3)(42)
x +5/9 = 70
Now, we can subtract 5/9 from both sides.
x = 69 4/9
__
Working it in the usual "two-step equation" manner, you would subtract 1/3 first, then multiply by 5/3. IMO, this is messier, as you have ...
(5/3)(3/5x) = (5/3)(41 2/3)
x = (5/3)(125/3) = 625/9 = 69 4/9
Ответ:
y = -
x - 2
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y = -
+ 6 ← is in slope- intercept form
with slope m = -![\frac{1}{2}](/tpl/images/0704/9941/9cdae.png)
Parallel lines have equal slopes, thus
slope of parallel line = -![\frac{1}{2}](/tpl/images/0704/9941/9cdae.png)
The line crosses the y- axis at (0, - 2) ⇒ c = - 2
y = -
x - 2 ← equation of parallel line