3(2x–7)=5–(1–x)
6x-21 = 5 - 1 + x
subtract x from both sides
5x - 21 = 5-1
combine like terms
5x - 21 = 4
add 21 to both sides
5x = 25
divide both sides by 5
x = 5
What are the roots of 4x² = 8x-7?