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NikAS [45]
4 years ago
9

What is 3x - y = -4 2x - y = -10 Using substitution

Mathematics
2 answers:
kipiarov [429]4 years ago
5 0
3x - y = -4
3x - (-10) = -4 Substitute
3x + 10 = -4 Simplify
3x = -14 Separate numbers and variables
x = -14/3 Divide

2x - y = - 10
2x - (-10) = -10 Substitute
2x + 10 = -10 Simplify
2x = -20 Separate numbers and variables
x = -10 Divide
____ [38]4 years ago
4 0
3x-y=-4
-y=-3x-4
y=3x-4
2
2x-y=10
2x-(3x-4)=10
2x-3x+4=10
x=6
2x-y=-10
2(6)-y=-10
12-y=-10
-y=-22
y=22
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4 years ago
X + 11 &lt; 6 <br> Solve and graph on a number line
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Answer & Step-by-step explanation:

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(The bolded part of the line is the side you shade the graph on. In case you can't see it, you have to shade the left side of the open circle.)

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3 years ago
What is the value of x?
Sophie [7]
If you need the answer only, you can just scroll to the bottom.

So, we know that a right angle is 90 degrees, and we know that it is divided in two parts. So, we must set up the equation knowing the angles.
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So, we need to begin simplifying the equation until we have isolated the variable. We can start by subtracting 60 from 90 to get rid of the 60 on the left side of the equation. 
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So, we have :
X = 30/3.
Simplify 30/3.
30/3 = 10.
So:
X = 10
4 0
3 years ago
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