Question

Solve for s: 7s + 4(3-5) = 18

Answer 1

7s+4(3-5)=18

7s+12-20=18

7s=18-12+20

7s=26

s=3.714

Answer 2

7s + 4(3-5) = 18

Multiply the bracket by 4

(4)(3)=12

(4)(-5)=-20

7s+12-20=18

7s-8=18

Move -8 to the other side.

Sign changes from -8 to +8

7s-8+8=18+8

7s=18=8

7s=26

Divide both sides by 7

7s/7=26/7

Answer: s=26/7 or s=3 5/7