4 7x 2 3 =- 1 5 July 8, 2019 16 32 64 128 7x 2 4 1 5x 3 2x 4 7x 3 3x 2 5x 1 0 2 5x 3 )- 4 7x 1 )=- 88 3 7x 2 5y 1 6x 4 8y Tìm x biết 4 7x 2 3 =- 1 5 3x 2 4x 4 7x 3 1 5x in standard form 5x 4 7x 3 5x 2 5x 1 0 2 7x 1 5x 3 7x 4 5x class 8 2 7x 1 5x 3 7x 4 5x answer 2 7x 1 5x 3 7x 4 5x verify 7x 2 5 4 9x 3 x 1 3 )- 5
