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Natasha2012 [34]
2 years ago
8

Three times a number increased by 7 is 100. Find the number.

Mathematics
2 answers:
velikii [3]2 years ago
7 0

Answer:

31

Step-by-step explanation:

100-7= 93

93÷3=31

4vir4ik [10]2 years ago
4 0

Answer:

the number is 31

Step-by-step explanation:

the number is the variable x

3 times the number is 3x

increased by 7 is +7

is 100 is =100

3x +7 =100

subtract 7 from both sides

3x =93

divide by 3 on both sides

x = 31

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Read 2 more answers
Does anyone know the answer to this!?
PolarNik [594]

Answer:

|A_y|=\left|\begin{array}{cc}12&7\\ \\17&-51\end{array}\right|

Step-by-step explanation:

You can use these Cramer's formulas to solve for x and y:

x=\dfrac{|A_x|}{|A|},\\ \\y=\dfrac{|A_y|}{|A|},

where

|A|=\left|\begin{array}{cc}12&-13\\ \\17&-22\end{array}\right|\\ \\ \\|A_x|=\left|\begin{array}{cc}7&-13\\ \\-51&-22\end{array}\right|\\ \\ \\|A_y|=\left|\begin{array}{cc}12&7\\ \\17&-51\end{array}\right|

So,

|A_y|=\left|\begin{array}{cc}12&7\\ \\17&-51\end{array}\right|

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What number sentance can be used to find 42 divided by 7
olga nikolaevna [1]

you can use the number sentence 42/7


7 0
3 years ago
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