2.9 - (x + 3.1) = -2.72.9 - x - 3.1 = -2.7-x = -2.7 + 3.1 - 2.9-x = -2.5x = 2.5
4.7 - (2.7 - x) = 5.374.7 - 2.7 + x = 5.37x = 5.37 - 4.7 + 2.7x = 3.37
-(6.23 - 3.17) - 4.17-(3.06) - 4.17-3.06 - 4.17-7.23
Therefore, the solutions are:
2.9 - (x + 3.1) = -2.7
2.9 - x - 3.1 = -2.7
-x = -2.7 + 3.1 - 2.9
-x = -2.5
x = 2.5
4.7 - (2.7 - x) = 5.37
4.7 - 2.7 + x = 5.37
x = 5.37 - 4.7 + 2.7
x = 3.37
-(6.23 - 3.17) - 4.17
-(3.06) - 4.17
-3.06 - 4.17
-7.23
Therefore, the solutions are:
x = 2.5x = 3.37-7.23