2z+9.75-7z+-5.15?

1 ⤊

2007-10-19 01:33:02 · 4 answers · asked by Erica A 1 in Science & Mathematics ➔ Mathematics

4 answers

2z+9.75-7z+ -5.15
2z-7z=-9.75+5.15
-5z=-4.6
z=0.92

2007-10-19 01:40:29 · answer #1 · answered by aizirk 2 · 0⤊ 1⤋

Combine like terms.
2z - 7z + 9.75 - 5.15 =
-5z + 4.6.

Edit: Never use +-, without grouping symbols. In this case, +(-5.15), which is equivalent to -5.15.

Note: This is an expression, not an equation. The value of the variable, z, cannot be determined.

2007-10-19 08:39:22 · answer #2 · answered by Darlene 4 · 0⤊ 0⤋

2z+9.75-7z+-5.15
= -5z + 4.6

2007-10-19 08:45:39 · answer #3 · answered by orangejuice 2 · 1⤊ 0⤋

-5z+4.60

2007-10-19 10:26:31 · answer #4 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋