Question

1.Rezolva următoarele ecuații :a)×+59=86
b)3×+12=45
c)25-2•×=1
d)171:×=9
e)4•(4×-15)+3=7

Answer 1

a)
$x= 86 - 59 \\ x = 27$
b)
$2x = 25 + 1 \\ 2x = 26 \\ x = 26 \div 2 \\ x = 13$
c)
$3x = 45 - 12 \\ 3x = 33 \\ x = 33 \div 3 \\ x = 11$
d)
$x = 171 \div 9 \\ x = 19$