h)
c - 10 = 13
c = 13 + 10
c = 23
k)
k + 3 = 7
k = 7 - 3
k = 4
e)
x · 7 = 21 / : 7
x = 3
l)
k · 3 = 27 / : 3
k = 9
a)
2 · x + 5 = - 3
2x + 5 = - 3
2x = - 3 - 5
2x = - 8 / : 2
x = - 4
h)
6 · c - 10 = 14
6c - 10 = 14
6c = 14 + 10
6c = 24 / : 6
c = 4