Question

×-12=4=8-12=4
5×=20=
×+9=20=11+9=20
2×=14=
3×+1=16=
2×+1=11
5×-9=6
3×+2×=15
×+1=10×+10=
10×-5+3×-6=10×+10=
alguien que me ayude ​

Answer 1

Respuesta:

$x - 12 = 4 \\ x = 4 + 12 \\ x = 16$

$5x = 20 \\ x = \frac{20}{5} \\ x = 4$

$x + 9 = 20 \\ x = 20 - 9 \\ x = 11$

$2x = 14 \\ x = 14 \div 2 \\ x = 7$

$3x + 1 = 16 \\ 3x = 16 - 1 \\ 3x = 15 \\ x = 15 \div 3 \\ x = 5$

$2x + 1 = 11 \\ 2x = 11 - 1 \\ 2x = 10 \\ x = 10 \div 2 \\ x = 5$

$5x - 9 = 6 \\ 5x = 6 + 9 \\ 5x = 15 \\ x = 15 \div 5 \\ x = 3$

$3x + 2x = 15 \\ 5x = 15 \\ x = 15 \div 5 \\ x = 3$

$x + 1 = 10x + 10 \\ 1 - 10 = 10x - x \\ - 9 = 9x \\ - 9 \div 9 = x \\ - 1 = x$

$10x - 5 + 3x - 6 = 10x + 10 \\ 13x - 11 = 10x + 10 \\ 13x - 10x = 10 + 11 \\ 3 x = 21 \\ x = 7$