I need help with this

look at picture

Complementary angles

x=43

Step-by-step explanation:

complementary angles will add up to equal 90 so we set up an equation to solve x

12+x+25=90

step 1 combine like terms

12+25=37 so now its

37+x=90

step 2 we subtract each side by 37

90-37=43

x=43

hope this helps and have a great day :)

53°

Step-by-step explanation:

Complementary angle = 90°

So, 12° + (x+25°) = 90°

Subtract 12 from both sides

x+25°=78°

Subtract 25 from both sides

x=53°

b

step-by-step explanation:

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.