Question

21,3х–7,3–9,3х=90,02!!!!!!

Answer 1

$21,3x - 7,3 - 9,3x = 90,02 \\ 12x - 7,3 = 90,02 \\ 12x = 90,02 + 7,3 \\ 12x = 97,32 \\ x = 97,32 \div 12 \\ x = 8,11$