Question

Gente me ajuda pfvr ✊

Answer 1

$a)x + 40 = 90 \\ x = 90 - 40 \\ x = 50$

$b)x + 30 + x - 10 = 90 \\ x + x = 90 - 30 + 10 \\ 2x = 70 \\ x = 70 \div 2 \\ x = 35$

$c)3x + 2x = 90 \\ 5x = 90 \\ x = 90 \div 5 \\ x = 18$