Question

$\\ x \times 2 \times 10 = 80 \\ x \ \times 2 \times 10 = 200 \\ x \times 2 \times 10 = 800$
$4\times x \times 10 = 80 \\ 40 \times x \times 20 = 800 \\ 40 \times x \times 2 = 800$
$30 \times 10 \times x = 900 \\ 3 \times 10 \times x \times = 90 \\ 2 \times 2 \times x = 800$
Vă rog ajutaţimă​

Answer 1

Explicație pas cu pas:

$x \times 2 \times 10 = 80 \iff x \times 20 = 80 \\ \iff x = 80 : 20 \implies x = 4$

$x \ \times 2 \times 10 = 200 \iff x \times 20 = 200 \\ \iff x = 200 : 20 \implies x = 10$

$x \times 2 \times 10 = 800 \iff x \times 20 = 800 \\ \iff x = 800 : 20 \implies x = 40$

$4\times x \times 10 = 80 \iff x \times 40 = 80 \\ \iff x = 80 : 40 \implies x = 2$

$40 \times x \times 20 = 800 \iff x \times 800 = 800 \\ \iff x = 800 : 800 \implies x = 1$

$40 \times x \times 2 = 800 \iff x \times 80 = 800 \\ \iff x = 800 : 80 \implies x = 10$

$30 \times 10 \times x = 900 \iff x \times 300 = 900 \\ \iff x = 900 : 300 \implies x = 3$

$3 \times 10 \times x = 90 \iff x \times 30 = 90 \\ \iff x = 90 : 30 \implies x = 3$

$2 \times 2 \times x = 800 \iff x \times 4 = 800 \\ \iff x = 800 : 4 \implies x = 200$

Answer 2

Răspuns:

$x \times 2 \times 10 = 80 \\ 20x = 80 \\ x = 80 \div 20 \\ x = 4 \\ \\ x \times 2 \times 10 = 200 \\ 20x = 200 \\ x = 200 \div 20 \\ x = 10 \\ \\ x \times 2 \times 10 = 800 \\ 20x = 800 \\ x = 800 \div 20 \\ x = 40 \\ \\ 4x \times 10 = 80 \\ 40x = 80 \\ x = 80 \div 40 \\ x = 2 \\ \\ 40x \times 20 = 800 \\ 800x = 800 \\ x = 800 \div 800 \\ x = 1 \\ \\ 40x \times 2 = 800 \\ 80x = 800 \\ x = 800 \div 80 \\ x = 10 \\ \\ 30 \times 10x = 900 \\ 300x = 900 \\ x = 900 \div 300 \\ x = 3 \\ \\ 3 \times 10x = 90 \\ 30x = 90 \\ x = 90 \div 30 \\ x = 3 \\ \\ 2 \times 2x = 800 \\ 4x = 800 \\ x = 800 \div 4 \\ x = 200$