Question

A)15=×+5
B)2+×=33
C)5×+1=36
D)7×-2=5
E)2×(×+1)=18
F)5×(×-4)=15
G)5×-14-2×=28
H)2×+6×+20=52
I)7×(×+3)+4×(×-1)=72
J)2×(×-5)+3×(×1)=72
K)7×+2=23
L)3×+2=6×-1
M)7×-3=4×+15
N)ײ-65=-16
Ayudenme es para mañana

Answer 1

1.

$x =10$

2.

$x = 31$

3.

$x = \frac{36 - 1}{5}$

$x = \frac{35}{5}$

$x = 7$

4.

$x = \frac{5 + 2}{7}$

$x = \frac{7}{7}$

$x = 1$

5.

$2 {x}^{2} + 2x - 18 = 0$

6.

$5 {x}^{2} - 20x - 15 = 0$

7.

$5x - 2x = 28 + 14$

$3x = 42$

$x = \frac{42}{3}$

$x = 14$

8.

$2x + 6x = 52 - 20$

$8x = 32$

$x = \frac{32}{8}$

$x = 4$

9.

$7 {x}^{2} + 21x + 4 {x}^{2} - 4x = 72$

$11 {x}^{2} + 17x - 72 = 0$

10.

$2 {x}^{2} - 10x + 3 {x}^{2} + 3x - 72 = 0$

$5 {x}^{2} - 7x - 72 = 0$

11.

$7x = 23 - 2$

$x = \frac{21}{7}$

$x = 3$

12.

$3x - 6x = - 1 - 2$

$- 3x = - 3$

$x = \frac{ - 3}{ - 3}$

$x = 1$

13.

$7x - 4x = 15 + 3$

$3x = 18$

$x = \frac{18}{3}$

$x = 6$

14.

${x}^{2} = - 16 + 65$

${x}^{2} = 49$

$\sqrt{ {x}^{2} } = \sqrt{49}$

$x = 7$