Question

aflati valoarea nr x din egalitatea 3+2 x(x:4-12)=15
Repede coroana​

Answer 1

$3 + 2 \times (x \div 4 - 12) = 15 \\ 2 \times (x \div 4 - 12) = 15 - 3 \\ 2 \times (x \div 4 - 12) = 12 \\ x \div 4 - 12 = 12 \div 2 \\ x \div 4 - 12 = 6 \\ x \div 4 = 6 + 12 = 18 \\ x = 18 \times 4 \\ x = 72$