6.4x - 2.1x = -77.4?

1 ⤊

6.4x - 2.1x = -77.4?

2007-07-22 12:52:25 · 3 answers · asked by melissa s 1 in Science & Mathematics ➔ Mathematics

3 answers

6.4x -2.1x = - 77.4

Collect like terms

4.3x = - 77.4

Divide both sides of the equation by 4.3

4.3 x / 4.3 = - 77.4 / 4.3

x = - 77.4 / 4.3

x = - 18

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2007-07-22 13:19:55 · answer #1 · answered by SAMUEL D 7 · 0⤊ 1⤋

6.4x-2.1x=-77.4
collect like terms
4.3x=-77.4
isolate x
x=-18

2007-07-22 20:20:23 · answer #2 · answered by Dill 4 · 0⤊ 0⤋

6.4x - 2.1x = -77.4
(6.4-2.1) x = -77.4
4.3 x = -77.4
x = (-77.4 / 4.3)
x = -18

2007-07-22 19:59:11 · answer #3 · answered by gostob2 3 · 1⤊ 0⤋