algebra 1

Is -7 + 9 = -9 + 7 true, false, or open?

a. true
b. false (this one?)
c. open

Is 4x - 3 = 19 true, false, or open?

a. true
b. false
c. open (this one?)

Which of the following is a solution to the equation 16 = 4x - 4?

a. -5
b. -4
c. 5 (this one?)
d. 16

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  1. For your first question think about it like this -7+9=2 and -9+7=-2. -2 and 2 are not equal.

    For 4x-3=19 you need to add 3 to both sides of your equation and then divide by four on both sides to get your answer for x then plug in x to your equation and see if it equals 19 in the end.

    For 16=4x-4 add 4 to both sides and divide by 4x this should give you your final solution as to what x is equal to. I hope this helps.

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  2. whoops typo on your last problem I meant divide by 4 not 4x my apologies.

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  3. your choices were all correct

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