kiaunismary kiaunismary

28-05-2018
Mathematics

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Is -7 a solution to the8(1/4×+3/4)-3=17

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McChuck McChuck

28-05-2018

-7 is the not the solution.

If you plug in -7 into the equation, you get -11, which doesn't equal 17.

8 (1/4x+ 3/4) - 3 = 17

8 (1/4(-7)+ 3/4) - 3 = 17

8 (-7/4 + 3/4) - 3 = 17

8 (-4/4) - 3 = 17

8 (-1) - 3 = 17

-8 - 3 = 17

-11 [tex] \neq [/tex] 17

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altavistard altavistard

28-05-2018

Given 8(1/4×+3/4)-3=17 and x = -7, check whether -7 is a solution. Subst. -7 for x:

8(1/4(-7)+3/4)-3=17
Mult everything by 4 to eliminate the fractions:

8(-7 + 3) - 3 = 17
Simplify:

8(-4) - 3 = 68 This is false, so x = -7 is not a solution.

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