1.) -(2n - 12 - n) - 21 - 7 - (-(-4n + 3 - 2n)) - 12
Multiply the - into (2n - 12 - n), and multiply the - into (-4n + 3 - 2n)
-2n + 12 + n - 21 - 7 - (4n - 3 + 2n) - 12
Multiply/distribute the - into (4n - 3 + 2n)
-2n + 12 + n - 21 - 7 - 4n + 3 - 2n - 12
Combine like terms
-7n - 25
2.) -0.2(-9b + 4) - 0.4(2b - 3) + 0.3(b + 6) - 2
Multiply -0.2 into (-9b + 4), multiply -0.4 into (2b - 3), and multiply 0.3 into (b + 6)
1.8b - 0.8 - 0.8b + 1.2 + 0.3b + 1.8 - 2
Combine like terms
1.3b + 0.2
3.) 0.2b + 3(-9b + 4) - 0.4(2b - 3) + 0.3(b + 6 - 2b)
0.2b + 3(-9b + 4) - 0.4(2b - 3) + 0.3(6 - b)
0.2b - 27b + 12 - 0.8b + 1.2 + 1.8 - 0.3b
-27.9b + 15
4.)
Simplify the numbers/variables inside the parentheses first, then multiply 2/3 into (6 - 9x), and multiply -2/7 into (-21x + 6)
4 - 6x + 6x -
16/7
5.)
41/5x + 3