Question

ME AYUDAN CON MI TAREA PORFA
ECUACIONES
1; 3x+4x=16
2; 8a+7b=-1
3; 5m+3=4m-8
4; 3r=1
5; 7a+3=-4
6; 8x+6=6(x+4)
7; 6/3a+3=12

Answer 1

1) 3x + 4x = 16
7x = 16
x = 16/7

2) 8a + 7b = -1
si encuentras "a"
8a = -1 - 7b
a = ( - 1 - 7 b ) / 8
si encuentras "b"
7b = -1 -8a
b = ( - 1 - 8a ) / 7

3) 5m + 3 = 4m - 8
5m - 4m = - 8 - 3
m = - 11

4) 3r = 1
r = 1/3

5) 7a + 3 = - 4
7a = - 4 - 3
7a = -7
a = -7/7
a = -1

6) 8x + 6 = 6 ( x + 4 )
8x + 6 = 6x + 24
8x - 6x = 24 - 6
2x = 18
x = 18/2
x = 9

7) 6/3 a + 3 = 12
6/3 a = 12 - 3
6/3 a = 9
2a = 9
a = 9/2