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wlad13 [49]
3 years ago
14

Double number line 3t+15=45

Mathematics
1 answer:
Reika [66]3 years ago
4 0

Answer:

t=-10 or t=20

Step-by-step explanation:

We want to solve the equation:

|3t - 15|  = 45

We use the definition of the absolute value function to get:

- (3t - 15) = 45 \: or \: (3t - 15) = 45

Divide through the first equation by -1 to get:

3t - 15 =  - 45 \: or \: 3t - 15 =45

We now add 15 to both sides of the equation to get:

3t  =  - 45 + 15 \: or \: 3t  =45 + 15

3t  =  - 30 \: or \: 3t  =60

Divide through by 3

t =  - 10 \: or \: t = 20

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