Linear Equation In One Variable Class 7

Which of the following is not a linear equation?

• 3x - 1 = - 2x

• xy - 3 = x

• x + 2y = 10

• (x-5) ⁄ 7 = (x-2) ⁄ 3

Construct linear equation for the following statement:

Two numbers are in the ratio 5 : 7 and sum of the numbers is 120

• 5x + 7x = 120

• 5x - 7x =120

• x ⁄ 5 + x ⁄ 7 = 120

• None of the above

Identify two consecutive multiples of 3 whose sum is 57.

• 24 and 33

• 27 and 30

• 21 and 36

• None of the above

Solve for x.  $3x+2\left(1-3x\right)=0$  

•  $2=0$  doesn't make sense

•  $x=1$  

•  $x=\frac{2}{3}$  

•  $2=3x\ \rightarrow$  no solution

Solve.

5(y + 4) = 4(y + 5)

• 0

• 2

• no solution

• All real numbers

Solve:
2(4x - 3) - 8 = 4 + 2x

• x = 5/3
• x = 3
• x = 1
• x = 2

Solve the following equation:  $0.25\left(4x-5\right)=0.75x+8$  

• 37

• 36

• 38

• 35

Solve the equation
-8x - 8 + 3(x - 2) = -3x + 2

• x = -8
• x = 8
• x = 2
• x = -2

 $\frac{4}{9}\div?\ =\ -\frac{8}{15}$  

•  $-\frac{32}{45}$  

•  $-\frac{8}{5}$  

•  $-\frac{9}{10}$  

•  $-\frac{5}{6}$  

Which number is a rational number ?

• 1/4
• π
• √3
• 4.632789...