AJRL2005
27.09.2021 •
Mathematics
1. Se tiene un segmento de 7.2 cm. ¿Cuál será la medida de la tercera parte del segmento?
A) 3.6 cm
B) 21.6 cm
C) 2.4 cm
D) 2.16 cm
Solved
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Ответ:
x= 4
Step-by-step explanation:
3x + 7 = 5x - 1
combine the like numbers: add 1 to the other side, isolating 5x
3x + 8 = 5x
Subtract 3x from 5x, isolating 8
8 = 2x
divide
4 = x
Check if it works
3(4) + 7 = 5(4) - 1
19 = 19
Yes, it is correct