3 years ago

5x + -6 = 7x + 4 what is the value of x??

Mathematics

1 answer:

ra1l [238]3 years ago

5 0

Answer:

x= -5

Step-by-step explanation:

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Solve (x² - 16)(x² - 9) = 0

Karo-lina-s [1.5K]

Answer:

x=-4,4,-3,3

Step-by-step explanation:

Factor by the difference of two squares

${x}^{2} - {y}^{2} = (x + y)(x - y)$

${x}^{2} - 16 = (x + 4)(x - 4) \\ {x}^{2} - 9 = (x + 3)( x - 3)$

$(x + 4)(x - 4)(x + 3)(x - 3) = 0$

Therefore, our answer is x = -4,4,-3,3

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3 years ago

Isaac paid $75 for 15 hamburgers at the local supermarket for a family

xxMikexx [17]

Answer: $36

Step-by-step explanation: Divide 75 by 15, which gives you a cost of $5 per burger. If the cost goes down by 50 cents, you’re left with $4.50 per burger. Multiply this by 8 to get $36.

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3 years ago

How do i solve 7 + x /3 = 2x - 5

ExtremeBDS [4]

Step-by-step explanation:

7 + x/3 =2x - 5

7 + 5=2x - x/3

12 = 5x/3

cross multiply

36=5x

x=36/5

x=7.2

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3 years ago

What is 8x+4/2 in simplest form ?

Marrrta [24]

The simplest form is 8 x + 2.

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