Explicación paso a paso:
a.
m+8 -2= -2m + 5m -20
m +2m -5 m = -20 -8 +2
-2 m = -26
m = -26/-2
m = 13
b.
x -15 = 49
x = 49 +15
x = 64
c.
3 y + 7y -2y = 16
8y = 16
y = 16/8
y = 2
d.
5a + 2a - 10 = 3a + 20
5a + 2a - 3a = 20 + 10
4a = 30
a = 30/4
a = 7.5
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Verified answer
Explicación paso a paso:
a.
m+8 -2= -2m + 5m -20
m +2m -5 m = -20 -8 +2
-2 m = -26
m = -26/-2
m = 13
b.
x -15 = 49
x = 49 +15
x = 64
c.
3 y + 7y -2y = 16
8y = 16
y = 16/8
y = 2
d.
5a + 2a - 10 = 3a + 20
5a + 2a - 3a = 20 + 10
4a = 30
a = 30/4
a = 7.5