Question

va rooogimi trebuie urgeeent!!​

Answer 1

Răspuns:

$((2 \times x - 15) \div 3) + 95 = 100 \\ (2 \times x - 15) \div 3 = 100 - 95 \\ (2 \times x - 15) \div 3 = 5 \\ 2 \times x - 15 = 5 \times 3 \\ 2 \times x - 15 = 15 \\ 2 \times x = 15 + 15 \\ 2 \times x = 30 \\ x = 30 \div 2 \\ x = 15$

Answer 2

notăm cu a- nr necunoscut

(a×2-15):3+95=100

(2a-15):3=100-95

(2a-15):3=5

2a-15=5×3

2a-15=15 => 2a=15+15=> 2a=30=> a=30:2=> a=15