Question

Determina numerele necunoscute.3×a=21 b×2=20 24÷c=8 d÷2=9 m+m++m=18​

Answer 1

$3 \times a = 21$

$a = \frac{21}{3}$

$a = 7$

$b \times 10 = 20$

$b = \frac{20}{2}$

$b = 10$

$24 \div c = 8$

$\frac{24}{c} = 8$

$24 = 8c$

$8c = 24$

$c = \frac{24}{8}$

$c = 3$

$d \div 2 = 9$

$\frac{1}{2} d = 9$

$d = 18$

$m + m + m =18$

$3m = 18$

$m = \frac{18}{3}$

$m = 6$