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anastassius [24]
3 years ago
13

PS! ..-4(7a + 5) = -160

Mathematics
1 answer:
inn [45]3 years ago
3 0

4(7a + 5) = -160

mutiply the bracket by 4

(4)(7a)(4)(+5)= -160

28a+20= -160

move +20 to the other side

sign changes from +20 to -20.

28a+20-20= -160-20

28a= -180

Divide by 28

28a/28= -180/28

x= -180/28

reduce by dividing 4

-180/4= -45

28/4= 7

-45/7 or -6 3/7

Answer : x= -45/7 , x= -6 3/7

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Further explanation:

We have to find the general formula first

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Keywords: Arithmetic sequence, Common Difference

Learn more about arithmetic sequence at:

  • brainly.com/question/5510873
  • brainly.com/question/5461619

#LearnwithBrainly

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