Respuesta:
a) x+7=22
x=22-7
x=15
b)x+15=21
x=21-15
x=6
c) x+19=40
x=40-19
x=21
d) x-25=50
x=50+25
x=75
e)6x=42
x=42÷6
x=7
f)8x=88
x=88÷8
x=11
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Respuesta:
a) x+7=22
x=22-7
x=15
b)x+15=21
x=21-15
x=6
c) x+19=40
x=40-19
x=21
d) x-25=50
x=50+25
x=75
e)6x=42
x=42÷6
x=7
f)8x=88
x=88÷8
x=11