Find the value of x:
x - 10 = 7

Q. Find the value of $x$ : $7x-10=4x+11$

Q. Find the value of x in $\frac{7}{10}x+6=41$

Q. Find the value of x for which $7^{10}\times$ $7^8$ = ${\left(\frac{1}{7}\right)}^x$

Q. If 1 + 4 + 7 + 10 + ... + x = 287, find the value of x. [CBSE 2017]

Q. If 2 : 7 :: x : 21, find the value of x.