Let's solve each equation step by step:
1) (x+2) + x = 9x + 2 + x = 92x + 2 = 92x = 7x = 7/2x = 3.5
2) x + (7 + x) = 11x + 7 + x = 112x + 7 = 112x = 4x = 2
3) x + 2x - 5 = 403x - 5 = 403x = 45x = 15
4) x + (4 + x) + x = 16x + 4 + x + x = 163x + 4 = 163x = 12x = 4
Therefore, the solutions for each equation are:1) x = 3.52) x = 23) x = 154) x = 4
Let's solve each equation step by step:
1) (x+2) + x = 9
x + 2 + x = 9
2x + 2 = 9
2x = 7
x = 7/2
x = 3.5
2) x + (7 + x) = 11
x + 7 + x = 11
2x + 7 = 11
2x = 4
x = 2
3) x + 2x - 5 = 40
3x - 5 = 40
3x = 45
x = 15
4) x + (4 + x) + x = 16
x + 4 + x + x = 16
3x + 4 = 16
3x = 12
x = 4
Therefore, the solutions for each equation are:
1) x = 3.5
2) x = 2
3) x = 15
4) x = 4