Help!! This doesn't make any sense to me. Can anyone help me solve for the value of x?

Mathematics

1 answer:

notsponge [240]2 years ago

6 0

Exterior angle of the triangle is equal to the sum of the opposite angles.

9x = 5x + 9 + x

Combine like terms:
9x = 6x + 9

Take away 6x from both sides:
3x = 9

Divide by 3 on both sides:
x = 3

Answer: x = 3

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Help me please i don't understand this thanks

STALIN [3.7K]

Answer:

12.75

Step-by-step explanation:

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6 0

2 years ago

12x+7<-11 or 5x-8>40

puteri [66]

Answer:

$\large\boxed{x9\dfrac{3}{5}\to x\in\left(-\infty,\ -1\dfrac{1}{2}\right)\ \cup\ \left(9\dfrac{3}{5},\ \infty\right)}$

Step-by-step explanation:

$12x+7$

$5x-8>40\qquad\text{add 8 to both sides}\\\\5x-8+8>40+8\\\\5x>48\qquad\text{divide both sides by 5}\\\\\dfrac{5x}{5}>\dfrac{48}{5}\\\\x>\dfrac{48}{5}\\\\x>9\dfrac{3}{5}\\===========================$