beachgirl5800 beachgirl5800

08-07-2015
Mathematics

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Find the value of x if B is between A and C, AB=4x-9, BC= 3x+ 5, and AC=17

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hunaifirst hunaifirst

08-07-2015

u know ac = 17
ab = 4x-9
bc = 3x+5

------------------------------------
a b c

ac = ab + bc

17 =[ 4x-9 ] + [ 3x+5]

17 = 4x+3x -9 +5

17 = 7x -4

17+4= 7x

21 = 7x

21 : 7 = x

3. = x

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