Determine whether the following number sentences are true or false.
a. 4+8=10+5
b. 1/2+5/8=1.2−0.075
c. (71·603)·5876=603·(5876·71)
d. 13×175=13×90+85×13
e. (7+9)²=7²+9²
f. =3.141
g. √(4+9)=√4+√9
h. 1/2+1/3=2/5
i. 1/2+1/3=2/6
j. 1/2+1/3=5/6
k. 3²+4²=7²
l. 3²×4²=12²

37/3

step-by-step explanation:

step 1: simplify both sides of the equation.

7x+8(x+

1

4

)=3(6x−9)−8

7x+(8)(x)+(8)(

1

4

)=(3)(6x)+(3)(−9)+−8(distribute)

7x+8x+2=18x+−27+−8

(7x+8x)+(2)=(18x)+(−27+−8)(combine like terms)

15x+2=18x+−35

15x+2=18x−35

tep 2: subtract 18x from both sides.

15x+2−18x=18x−35−18x

−3x+2=−35

step 3: subtract 2 from both sides.

−3x+2−2=−35−2

−3x=−37

step 4: divide both sides by -3.

−3x

−3

=

−37

−3

x=

37

3

explanation:

step-by-step explanation:

if im not mistaking its

step-by-step explanation: