Irene made a mistake when she solved this inequality: Step 1: -6(x + 3) + 10 < -2 Step 2: -6x − 18 + 10 < -2 S

Question

Irene made a mistake when she solved this inequality:

Step 1: -6(x + 3) + 10 < -2
Step 2: -6x − 18 + 10 < -2
Step 3: -6x − 8 < -2
Step 4: -6x < 6
Step 5: x < -1

Between which two consecutive steps did Irene make a mistake?

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Verity 4 years 2021-07-27T12:40:56+00:00 1 Answers 26 views 0

Answers ( )

  1. dangkhoa
    0
    2021-07-27T12:42:03+00:00
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    Answer:

    she messed up on step two because she has to subtract 10 from both sides

    Step-by-step explanation:

    step 1: -6(x+3)+10<-2

    step2:-6(x+3)+10-10<-2-10

    step3: -6(x+3)<-12

    step4: (-6)(x+3)(-1)≥(-12)(-1)

    step5:6(x+3)>12

    step6:divide both sides by 6

    step7:simplify and subtract 3 from both sides and then simplify again

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )