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jek_recluse [69]
3 years ago
7

Consider the sequence of steps to solve the equation: 2(x − 4) + 6x = 9x − 10 Given ⇒ 2(x − 4) + 6x = 9x − 10 Step 1 ⇒ 2x − 8 +

6x = 9x − 10 Step 2 ⇒ 2x + 6x − 8 = 9x − 10 Step 3 ⇒ 8x − 8 = 9x − 10 Step 4 ⇒ 8x − 8x − 8 = 9x − 8x − 10 Step 5 ⇒ 0 − 8 = x − 10 Step 6 ⇒ −8 = x − 10 Step 7 ⇒ −8 + 10 = x − 10 + 10 Step 8 ⇒ 2 = x + 0 Step 9 ⇒ 2 = x Which step in solving this equation is justified by Combining Like Terms?
Mathematics
1 answer:
hram777 [196]3 years ago
4 0

Answer:

step 3 and step 4

Step-by-step explanation:

2(x − 4) + 6x = 9x − 10

2x - 8 + 6x  = 9x - 10

2x +6x - 9x  = -10 + 8

             -x    = -2

                 x = 2

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