Question

aswer with full formula​

Answer 1

Step-by-step explanation:

Ans 3.

x/4+x/6=x-7

3x+2x/12=x-7

5x/12=x-7

5x=12x-84

84=7x

x=12

Ans 4.

2/3x+1=7/3

2/3x=4/3

x=4/3÷2/3

x=4/3×3/2

x=2

Both of these questions don't have any formulas but rather the concept of LCM and linear equations in one variable

Answer 2

Required Answer:-

★ ${\red{\bf Solve \dfrac{x}{4} + \dfrac{x}{6} = x - 7}}$

Multiply both sides by 12.

:$\implies \sf 3x + 2x = 12x - 84$

:$\implies \sf 5x - 12x = - 84$

:$\implies \sf - 7x = - 84$

Divide both sides by -7.

:$\implies \sf x = 12$

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★ ${\red{\bf Solve \dfrac{2}{3} x + 1 = \dfrac{7}{3}}}$

Multiply both sides by 3.

:$\implies \sf 2x + 3 = 7$

:$\implies \sf 2x = 7-3$

:$\implies \sf 2x = 4$

:$\implies \sf x = \dfrac{4}{2}$

:$\implies \sf x = 2$