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umka2103 [35]
3 years ago
12

What is x for these two?

Mathematics
1 answer:
djverab [1.8K]3 years ago
6 0

Answer:

a)x=-10, b)x=7

Step-by-step explanation:

a)2x+6= x-4    

x=-6-4= 10

b) 20x-18x= +8+6

2x/2=14/2= 7=x

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Ten times an integer is added to seven times it’s square. If the result is 152, what was the original number?
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Answer:

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Step-by-step explanation:

Let the required number be a.

Given,

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= > Ten times of a + seven times of it's square = 152

= > 10( a ) + 7( a )^2 = 152

= > 10a + 7a^2 - 152 = 0

= > 7a^2 + 10a - 152 = 0

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= > 7a^2 + 38a - 28a - 152 = 0

= > a( 7a + 38 ) - 4( 7a + 38 ) = 0

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