Solve the following
-5x + 3 = 2x - 1

x=4/7

Step-by-step explanation:

get x alone.

1st get 3 on the other side of the = sign by using the opposite sign. the opposite of addition is subtraction

-5x+3=2x-1

-3 -3

-5x=2x-1-3

-5x=2x-4

now we get the xs together. the opposite of addition( the 2 is positive) is subtraction

-5x=2x-4

-2x -2x

-7x=-4

now let's get the -7 out of here. -7 is multiplying by x. the opposite of multiplication is division.

-7x = -4

-7. -7

x=-4/-7

negative divided by a negative is a positive

x=4/7

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,