ILL MARK BRAINLIEST. Solving Equations Using the digits 0 to 9 at most onetime each, fill in the boxes below to write three equations whose solution is 1/2. ​​

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

the answer is 40.

proof: