Answer:
r=6
Step-by-step explanation:
6/11=r/11
cross product
11*r=6*11
11r=66
r=66/11
r=6
Answer:
7
Step-by-step explanation:
2x+34=4(x+5)
2x+34=4x+20
-2x=-14
x=7
Answer:
x=13
Step-by-step explanation:
ok so let x+y=22
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x and y are the 2 unkown Number
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x-y=4
their difference is 4
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add both equations
(x+y=22)
+(x-y=4)
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y's cancel out
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2x=26
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x=13
Linear decreasing because it is a line with a negative slope
Answer: Solution:
7x=-49
Step-by-step explanation:
4x-3y=8→(1)
5x-2y=-11→(2)
equation(1)×2⇒8x-6y=16
equation(2)×3⇒15x-6y=-33
Substracting ⇒-7x=49