[tex] \frac{4 {x}^{2} }{49} + 6 = 3[/tex]
multiply through by the LCM , which is 49
[tex]49 \times \frac{4 {x}^{2} }{49} + 6 \times 49 = 3 \times 49[/tex]
[tex]4 {x}^{2} + 294 = 147[/tex]
[tex]4 {x}^{2} = 147 - 294[/tex]
[tex]4 {x}^{2} = - 147[/tex]
dividing through by 4
[tex] \frac{4 {x}^{2} }{4} = \frac{ - 147}{4} [/tex]
[tex] {x}^{2} = - 36.75[/tex]
[tex]x = \sqrt{ - 36.75} [/tex]