Turn and Talk How are solving 2x + 4 = 20 and 2x - 4 = 20 alike? How are they different?

Mathematics

1 answer:

hjlf2 years ago

4 0

Answer:

they are both alike because you're dividing both equations by 2 . in both equations you're trying to get the variable by itself .

they are both different because both of the equations have a different x= . in equation 1 you subtract and in equation 2 you would add .

Step-by-step explanation:

For 2x+4=20 you would make +4 negative 4 to get the variable by itself .

then you'd subtract the numbers 20-4=16

then divide both sides by 2 2÷2 and 16÷2

x=8 is your answer

for 2x-4=20 you would make -4 and make it positive 4 to get the variable by itself

then you'd add the numbers 20+4

then divide both sides by 2 2÷2 and 24÷2

x=12

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2 years ago

A) 2-x,when x=5

MrRissso [65]

Answer:

a) 2-5 = -3

b) 3(4) + 2(4) = 20

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Step-by-step explanation:

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2 years ago