Exercice 27 - Équations
a)
-7x + 15 = 2x -3
-7x -2x = -3 -15
-9x = -18
x = [tex]\frac{-18}{-9}[/tex]
x = 2
b)
6x -10 = 7x + 3
6x -7x = 3 + 10
-x = 13
x = -13
c)
4t -3 = -10t + 4
4t + 10t = 4 + 3
14t = 7
t = [tex]\frac{7}{14}[/tex]
t = 0,5
d)
y + 1 = -3y + 4
y +3y = 4 -1
4y = 3
y = [tex]\frac{3}{4}[/tex]
y = 0,75