Question

Please help me with this??

Answer 1

19)

$90 = 21x + 6\\-21x = 6 - 90\\-21x = -84\\x = 4$

20)

$75 = 11x - 2\\-11x = -2 - 75\\-11x = -77\\x = 7$

21)

$60 = 8x - 4\\-8x = -4 - 60\\-8x = -64\\x = 8$

22)

$132 = x + 139\\-x = 139 - 132\\-x = 7\\x = -7$

23)

$-1 + 14x = 12x + 17\\14x - 12x = 17 + 1\\2x = 18\\x = 9$

24)

$23x - 5 = 21x + 5\\23x - 21x = 5 + 5\\2x = 10\\x = 5$