Indique a incógnita de cada equação:
A) 2x-3= 15
B) 4y=30 -18
C) 5z - 6 = z+14
D) m + 4 = 20
A) 2x-3= 15
B) 4y=30 -18
C) 5z - 6 = z+14
D) m + 4 = 20
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a) x
b) y
c) z
d) m
2x - 3 = 15
2x = 15 + 3
2x = 18
x = 18/2
x = 9
B)
4y = 30 - 18
4y = 12
y = 12/4
y = 3
C)
5z - 6 = z + 14
5z - z = 14 + 6
4z = 20
z = 20/4
z = 5
D)
m + 4 = 20
m = 20 - 4
m = 16