Two sodas and two sundaes cost $4. three sodas and one sundae coat $3.90. what is the cost of one soda and one sundae

  $2

Step-by-step explanation:

The first purchase is twice the value we seek:

  2 sodas + 2 sundaes = $4

  2 × (1 soda + 1 sundae) = $4

  1 soda + 1 sundae = $2 . . . . . . . . . divide by 2

let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation:

i got 10.28 but that rounds up to 10.3