3 years ago

Solve for x. x/7 = -3

1 answer:

5 0

x = -21

explanation: a trick i used was just do -3 times 7 and get my answer -21. if you are unsure if the answer is right just check your work with a calculator. -21 divided by 7 is -3 so -21 is the value of x. please mark brainliest !!

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To start the school year, a teacher spends $54.35 in school supplies for her classroom. During the course of the year, she will

Paha777 [63]

I do believe it is x

7 0

3 years ago

Plz help me solve these:)

igomit [66]

Answer:

1. $x=3$

2. $1$

3. $x=11$

Step-by-step explanation:

$1.\\\frac{x}{5}=\frac{12}{20}\\\\x=3\\\\\\2.\\-1\frac{3}{5}*(-\frac{5}{8})=\\\\-\frac{8}{5}*(-\frac{5}{8})=\\\\-(-\frac{40}{40})=\\\\-(-1)=\\\\1\\\\\\3.\\\frac{x}{14}=\frac{55}{70}\\\\x=11$

3 0

4 years ago

3x + y = 19 , and x + 3y = 1.<br> Find the value of 2x + 2y<br> Can anyone explain this one for me?

velikii [3]

$First\ solve\ system\ of\ equations\ to\ find\ values\ of\ x\ and\ y\\\\ \left \{ {{3x+y=19\ \ |*(-3)} \atop {x+3y=1\ \ \ \ \ \ \ \ \ }} \right.\\\\ \left \{ {{-9x-3y=-57} \atop {x+3y=1 }} \right.\\+------\\Addition\ method\\\\
-8x=-56\ \ |:(-8)\\\\x=7\\\\y=19-3x=19-3*7=19-21=-2\\\\
2x+2y=2*7+2*(-2)=14-4=10\\\\Answer\ is\ 10.$