Solution set assistance?

0 ⤊

0.9(x+80)+0.1x=97

2007-12-12 06:19:55 · 2 answers · asked by higherlovetx 5 in Science & Mathematics ➔ Mathematics

multiply the 0.9 factor through the first term and then collect like terms and solve for x
0.9x + 7.2+0.1x = 97
0.9x + 0.1x = 97 - 7.2
x = 89.8

2007-12-12 06:25:21 · answer #1 · answered by Jim L 3 · 0⤊ 1⤋

first multiply the eq by 10 to remove the decimal numbers
9(x+80)+x=970
9x+720+x=970
10x=250
x=25

2007-12-12 14:27:05 · answer #2 · answered by norman 7 · 0⤊ 1⤋