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2 June, 23:04

if ZA and ZB are supplementary angles. if mZA = (3x-23) and mZB = (2x-12) then find the measure of ZB

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  1. 3 June, 00:54
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    mZB = 74

    Step-by-step explanation:

    ZB+ZA=180

    3X-23+2X-12=180

    5X-35=180

    5X=180+35

    5X=215 (then divide both sides by 5 to x be left alone.)

    X=43 ... so ZB=2 (43) - 12

    =86-12=74
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