Răspuns: a = 24
Explicație pas cu pas:
[tex]\bf{ [3 \times (47 \times 5 - 1125 \div 5) + 2 \times (a + 1)] \times 2 = 160 }[/tex]
[tex]\bf{ [ 3 \times (235 - 225) + 2a + 2 ] \times 2 = 160}[/tex]
[tex]\bf{(3 \times 10 + 2a + 2) \times 2 = 160}[/tex]
[tex]\bf{(30 + 2a + 2) \times 2 = 160}[/tex]
[tex]\bf{(32 + 2a) \times 2 = 160}[/tex]
[tex]\bf{64 + 4 a = 160}[/tex]
[tex]\bf{4a = 160 - 64}[/tex]
[tex]\bf{4a = 96}[/tex]
[tex]\bf{a = 96 \div 4 = \boxed{ \bf{24} } }[/tex]
