35=0.5(7*a)

Solution for 35=0.5(7*a) equation:

Simplifying
35 = 0.5(7a)

Remove parenthesis around (7a)
35 = 0.5 * 7a

Multiply 0.5 * 7
35 = 3.5a

Solving
35 = 3.5a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-3.5a' to each side of the equation.
35 + -3.5a = 3.5a + -3.5a

Combine like terms: 3.5a + -3.5a = 0.0
35 + -3.5a = 0.0

Add '-35' to each side of the equation.
35 + -35 + -3.5a = 0.0 + -35

Combine like terms: 35 + -35 = 0
0 + -3.5a = 0.0 + -35
-3.5a = 0.0 + -35

Combine like terms: 0.0 + -35 = -35
-3.5a = -35

Divide each side by '-3.5'.
a = 10

Simplifying
a = 10