Question

resuelve:
a) -5 + 6 - ( -6 ) + 7 (-8) = ?
b) ( 12 ) + ( -15 ) - 8 + (-8) = ?
c) x -20 = 30
d) 5 + x = 15

Answer 1

a) = 6
b) = -19
c) = X=50
d) = X= 10