Drag each equation to show if it could be a correct first step to solving the equation 2(x+7)=36 2(x+7)=36 . 2x+7=36 2x+7=36 2x+14=36 2x+14=36 2(x+7)=72 2(x+7)=72 x+7=18 x+7=18 (2⋅x)+(2⋅7)=36 2·x+2·7=36 x+14=36 x+14=36 yes no not enough information

2(x + 7) = 36 |use distributive property

(2⋅x)+(2⋅7)=36

2·x+2·7=36

2x + 14 = 36

2(x + 7) = 36 |:2

x + 7 = 18

Answer (bold expressions).

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629