1) 84a + 25a + 7 = 44109a + 7 = 44109a = 443 - 109a = 43a = 4
2) 4(9 + 7x) = 236 + 28x = 228x = 21 - 328x = -1x = -15 / 28
3) 486 / (5x + 2) = 1486 = 18(5x + 2486 = 90x + 3450 = 90x = 450 / 9x = 5
4) 5(14 + b) + 6b = 2570 + 5b + 6b = 2511b = 18b = 188 / 1b = 17.09 (rounded to two decimal places)
1) 84a + 25a + 7 = 44
109a + 7 = 44
109a = 443 -
109a = 43
a = 4
2) 4(9 + 7x) = 2
36 + 28x = 2
28x = 21 - 3
28x = -1
x = -15 / 28
3) 486 / (5x + 2) = 1
486 = 18(5x + 2
486 = 90x + 3
450 = 90
x = 450 / 9
x = 5
4) 5(14 + b) + 6b = 25
70 + 5b + 6b = 25
11b = 18
b = 188 / 1
b = 17.09 (rounded to two decimal places)